cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effective potential analytic continuation approach for real time quantum correlation functions involving nonlinear operators
Creators: name: Horikoshi, Atsushi
name: Kinugawa, Kenichi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply the effective potential analytic continuation (EPAC) method to the calculation of real time quantum correlation functions involving operators nonlinear in the position operator $\hat{q}$. For a harmonic system the EPAC method provides the exact correlation function at all temperature ranges, while the other quantum dynamics methods, the centroid molecular dynamics and the ring polymer molecular dynamics, become worse at lower temperature. For an asymmetric anharmonic system, the EPAC correlation function is in very good agreement with the exact one at $t=0$. When the time increases from zero, the EPAC method gives good coincidence with the exact result at lower temperature. Finally, we propose a simplified version of the EPAC method to reduce the computational cost required for the calculation of the standard effective potential.
description: REVTeX4, 18 pages, 9 eps figures
Radio frequency reflectometry in silicon-based quantum dots
Creators: name: Liu, Y. -Y.
name: Philips, S. G. J.
name: Orona, L. A.
name: Samkharadze, N.
name: McJunkin, T.
name: MacQuarrie, E. R.
name: Eriksson, M. A.
name: Vandersypen, L. M. K.
name: Yacoby, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: RF reflectometry offers a fast and sensitive method for charge sensing and spin readout in gated quantum dots. We focus in this work on the implementation of RF readout in accumulation-mode gate-defined quantum dots, where the large parasitic capacitance poses a challenge. We describe and test two methods for mitigating the effect of the parasitic capacitance, one by on-chip modifications and a second by off-chip changes. We demonstrate that these methods enable high-performance charge readout in Si/SiGe quantum dots, achieving a fidelity of 99.9% for a measurement time of 1 $μ$s.
description: 6 pages, 4 figures
A mass, momentum, and energy conservative dynamical low-rank scheme for the Vlasov equation
Creators: name: Einkemmer, Lukas
name: Joseph, Ilon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The primary challenge in solving kinetic equations, such as the Vlasov equation, is the high-dimensional phase space. In this context, dynamical low-rank approximations have emerged as a promising way to reduce the high computational cost imposed by such problems. However, a major disadvantage of this approach is that the physical structure of the underlying problem is not preserved. In this paper, we propose a dynamical low-rank algorithm that conserves mass, momentum, and energy as well as the corresponding continuity equations. We also show how this approach can be combined with a conservative time and space discretization.
On the physical meaning of the gauge conditions of Classical Electromagnetism : the hydrodynamics analogue viewpoint
Creators: name: Rousseaux, Germain
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Physics (physics.class-ph)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Based on an analogy between Fluid Mechanics and Electromagnetism, we claim that the gauge conditions of Classical Electromagnetism are not equivalent contrary to the common belief. These "gauges" are usually considered as mathematical conditions that one must specify in order to solve any electromagnetic problem. Here, the author shows that these conditions are physical constraints which can be interpreted as electromagnetic continuity equations. As a consequence, light cannot be considered as a pure transverse wave in vacuum from the point of view of the potentials. We discuss the (lack of) meaning of gauge transformations.
Ca II H&K stellar activity parameter: a proxy for stellar Extreme Ultraviolet Fluxes
Creators: name: Sreejith, A. G.
name: Fossati, L.
name: Youngblood, A.
name: France, K.
name: Ambily, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Atmospheric escape is an important factor shaping the exoplanet population and hence drives our understanding of planet formation. Atmospheric escape from giant planets is driven primarily by the stellar X-ray and extreme-ultraviolet (EUV) radiation. Furthermore, EUV and longer wavelength UV radiation power disequilibrium chemistry in the middle and upper atmosphere. Our understanding of atmospheric escape and chemistry, therefore, depends on our knowledge of the stellar UV fluxes. While the far-ultraviolet fluxes can be observed for some stars, most of the EUV range is unobservable due to the lack of a space telescope with EUV capabilities and, for the more distant stars, to interstellar medium absorption. Thus, it becomes essential to have indirect means for inferring EUV fluxes from features observable at other wavelengths. We present here analytic functions for predicting the EUV emission of F-, G-, K-, and M-type stars from the log $R'_{HK}$ activity parameter that is commonly obtained from ground-based optical observations of the Ca II H&K lines. The scaling relations are based on a collection of about 100 nearby stars with published log $R'_{HK}$ and EUV flux values, where the latter are either direct measurements or inferences from high-quality far-ultraviolet (FUV) spectra. The scaling relations presented here return EUV flux values with an accuracy of about three, which is slightly lower than that of other similar methods based on FUV or X-ray measurements.
description: Accepted for publication by A&A
Previous documentation: Peeke fieldnotes
Creators: name: Peeke, Catherine
name: Beier, Christine
name: Michael, Lev
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: anb

description: Contains three PDFs, obtained free of cost upon request from the Language and Culture Archives of SIL International, of Catherine Peeke's work with Andoa [anb] speakers. Files 32a and 32b are handwritten notes on Andoa with glosses in English, local Spanish (closest to Loreto-Ucayali Spanish [spq]), and local Quechua (closest to Southern Pastaza Quechua [qup]). File 33a is typewritten notes, derived from 32a and 32b, of Andoa with glosses in English only (note that pages 6-9 are duplicates of pages 2-5).
Electroweak Measurements at CDF
Creators: name: Sidoti, Antonio
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present some recent measurements on electroweak physics using data collected by the CDF experiment at the Tevatron proton anti-proton collider ($\sqrt{s}=1.96\mathrm{TeV}$) at Fermilab (Batavia, Ill, USA).
description: 5 pages 3 figures contribution to the 2005 Lake Louise Winter Institute
Global Analysis of hadronic two-body B decays in the perturbative QCD approach
Creators: name: Hua, Jun
name: Li, Hsiang-nan
name: Lu, Cai-Dian
name: Wang, Wei
name: Xing, Zhi-Peng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Based on the flavor structure of four-quark effective operators, we develop an automatic computation program to calculate hadronic two-body $B$ meson decay amplitudes, and apply it to their global analysis in the perturbative QCD (PQCD) approach. Fitting the PQCD factorization formulas for $B\to PP,VP$ decays at leading order in the strong coupling $α_s$ to measured branching ratios and direct CP asymmetries, we determine the Gegenbauer moments in light meson light-cone distribution amplitudes (LCDAs). It is found that most of the fitted Gegenbauer moments of the twist-2 and twist-3 LCDAs for the pseudoscalar meson $P$ ($P=π$, $K$) and vector meson $V$ ($V=ρ$, $K^*$) agree with those derived in QCD sum rules. The shape parameter for the $B_s$ meson distribution amplitude and the weak phase $ϕ_3(γ)=(75.1\pm2.9)^\circ$ consistent with the value in Particle Data Group are also obtained. It is straightforward to extend our analysis to higher orders and higher powers in the PQCD approach, and to the global determination of LCDAs for other hadrons.
Screened thermonuclear reactions and predictive stellar evolution of detached double-lined eclipsing binaries
Creators: name: Liolios, Theodore
name: Kosmas, Theocharis
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The low energy fusion cross sections of charged-particle nuclear reactions (and the respective reaction rates) in stellar plasmas are enhanced due to plasma screening effects. We study the impact of those effects on predictive stellar evolution simulations for detached double-lined eclipsing binaries. We follow the evolution of binary systems (pre-main sequence or main sequence stars) with precisely determined radii and masses from 1.1Mo to 23Mo (from their birth until their present state). The results indicate that all the discrepancies between the screened and unscreened models (in terms of luminosity, stellar radius, and effective temperature) are within the observational uncertainties. Moreover, no nucleosynthetic or compositional variation was found due to screening corrections. Therefore all thermonuclear screening effects on the charged-particle nuclear reactions that occur in the binary stars considered in this work (from their birth until their present state) can be totally disregarded. In other words, all relevant charged-particle nuclear reactions can be safely assumed to take place in a vacuum, thus simplifying and accelerating the simulation processes.
description: 5 RevTex pages,no figures. Accepted for publication in Phys.Rev.C
Production of gamma rays and neutrinos in the dark jets of the microquasar SS433
Creators: name: Reynoso, Matias M.
name: Romero, Gustavo E.
name: Christiansen, Hugo R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the spectral energy distribution of gamma rays and neutrinos in the precessing microquasar SS433 as a result of pp interactions within its dark jets. Gamma-ray absorption due to interactions with matter of the extended disk and of the star is found to be important, as well as absorption caused by the UV and mid-IR radiation from the equatorial envelopment. We analyze the range of precessional phases for which this attenuation is at a minimum and the chances for detection of a gamma-ray signal are enhanced. The power of relativistic protons in the jets, a free parameter of the model, is constrained by HEGRA data. This imposes limits on the gamma-ray fluxes to be detected with instruments such as GLAST, VERITAS and MAGIC II. A future detection of high energy neutrinos with cubic kilometer telescopes such as IceCube would also yield important information about acceleration mechanisms that may take place in the dark jets. Overall, the determination of the ratio of gamma-ray to neutrino flux will result in a key observational tool to clarify the physics of heavy jets.
description: 10 pages, 13 figures. Accepted for publication in MNRAS
High Resolution, Deep Imaging Using Confocal Time-of-flight Diffuse Optical Tomography
Creators: name: Zhao, Yongyi
name: Raghuram, Ankit
name: Kim, Hyun K.
name: Hielscher, Andreas H.
name: Robinson, Jacob T.
name: Veeraraghavan, Ashok
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Optics (physics.optics)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Light scattering by tissue severely limits how deep beneath the surface one can image, and the spatial resolution one can obtain from these images. Diffuse optical tomography (DOT) is one of the most powerful techniques for imaging deep within tissue -- well beyond the conventional $\sim$10-15 mean scattering lengths tolerated by ballistic imaging techniques such as confocal and two-photon microscopy. Unfortunately, existing DOT systems are limited, achieving only centimeter-scale resolution. Furthermore, they suffer from slow acquisition times and slow reconstruction speeds making real-time imaging infeasible. We show that time-of-flight diffuse optical tomography (ToF-DOT) and its confocal variant (CToF-DOT), by exploiting the photon travel time information, allow us to achieve millimeter spatial resolution in the highly scattered diffusion regime ($> 50 $ mean free paths). In addition, we demonstrate two additional innovations: focusing on confocal measurements, and multiplexing the illumination sources allow us to significantly reduce the measurement acquisition time. Finally, we rely on a novel convolutional approximation that allows us to develop a fast reconstruction algorithm, achieving a 100$\times$ speedup in reconstruction time compared to traditional DOT reconstruction techniques. Together, we believe that these technical advances serve as the first step towards real-time, millimeter resolution, deep tissue imaging using DOT.
description: The updated version includes edits made to our paper in response to suggestions from reviewers. These changes include: updated 3D image reconstruction results, additional comments on prior work, and further explanations of the linear model. In addition, we made a correction to figure 9, relabeling the x-axis to the correct scale. Finally, we also updated our acknowledgements
Garijo-Guembe, Miquel Maria / Rohls, Jan / Wenz, Gunter, Mahl des Herrn
Creators: name: Schütz, Georg
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 4 (1988): Ökumenische Rundschau, Band 37, Heft 4
Detecting Entanglement can be More Effective with Inequivalent Mutually Unbiased Bases
Creators: name: Hiesmayr, B. C.
name: McNulty, D.
name: Baek, S.
name: Roy, S. Singha
name: Bae, J.
name: Chruściński, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Mutually unbiased bases (MUBs) provide a standard tool in the verification of quantum states, especially when harnessing a complete set for optimal quantum state tomography. In this work, we investigate the detection of entanglement via inequivalent sets of MUBs, with a particular focus on unextendible MUBs. These are bases for which an additional unbiased basis cannot be constructed and, consequently, are unsuitable for quantum state verification. Here, we show that unextendible MUBs, as well as other inequivalent sets in higher dimensions, can be more effective in the verification of entanglement. Furthermore, we provide an efficient and systematic method to search for inequivalent MUBs and show that such sets occur regularly within the Heisenberg-Weyl MUBs, as the dimension increases. Our findings are particularly useful for experimentalists since adding optimal MUBs to an experimental setup enables a step-by-step approach to detect a larger class of entangled states.
description: 6 pages, 1 figure; added details to d=9
Indications of a Pseudogap in the Nambu Jona-Lasinio model
Creators: name: Castorina, Paolo
name: Nardulli, Giuseppe
name: Zappala', Dario
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The survival of \bar q q bound states at temperatures higher than the chiral restoration temperature, T_c, recently observed in lattice QCD, is discussed in the framework of the Nambu Jona-Lasinio model. The perturbative determination of the spectral function provides an indication of a pseudogap phase above T_c.
description: Contributed to the International Workshop: QCD@Work 2005, Conversano, Bari, Italy, 16-20 Jun 2005
Quilting as a gendered activity: a study of male & female quilters' beliefs and perceptions of their art/craft
Creators: name: Little, Sheila Mae
Publisher: name: University of British Columbia
Year: 2009

description: The recognition of quilting as a valid art form by scholars, art critics, visual artists and quilters has attracted the attention of contemporary society enabling both men and women to identify quilting as their preferred choice of medium for artistic expression. Recent studies have investigated quilting from a female perspective but have neglected to include a male perspective. I decided to investigate how the gender of the individual quilter could be connected to differences in perceptions of quilting experiences. Establishing my own perspective of the quilt medium, I provide an explanation of my research methods and offer a brief overview of quilting literature before presenting the responses of five male and five female quilters participating in a qualitative study. The areas explored are: the medium of quilting, the motivation for quilting, the behaviours/habits and contexts of quilting, the relationship between gender and quilting and quilting in school curriculum. Also, I provide a comparison between contemporary literature and the data findings to indicate how the small sampling of quilters from my study compare to the perceptions held by present-day quilters. In conclusion, I discuss the implications my research has for art education and indicate further directions available for quilting research.
Longitudinal polarization of $Λ$ and $\bar Λ$ hyperons in deep-inelastic scattering at COMPASS
Creators: name: Alexakhin, V. Yu.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The production of Lambda and Lambda-bar hyperons by polarized muons of 160 GeV/c on a polarized 6LiD target has been studied using the COMPASS spectrometer. First preliminary results on the longitudinal polarization of Lambda and Lambda-bar hyperons produced in the deep-inelastic scattering will be presented for 2002 data set.
description: 4 pages, 2 figures, proceeding of SPIN2004, Trieste
Oscillations of sterile neutrinos from dark matter decay eliminates the IceCube-Fermi tension
Creators: name: Anchordoqui, Luis A.
name: Barger, Vernon
name: Marfatia, Danny
name: Reno, Mary Hall
name: Weiler, Thomas J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: IceCube has observed a flux of cosmic neutrinos, with a "bump" in the energy range $10 \lesssim E/{\rm TeV} \lesssim 100$ that creates a $3σ$ tension with gamma-ray data from the Fermi satellite. This has been interpreted as evidence for a population of hidden cosmic-ray accelerators. We propose an alternative explanation of this conundrum on the basis of cold dark matter which decays into sterile neutrinos that after oscillations produce the bump in the cosmic neutrino spectrum.
description: 10 pages, 3 figures. Note added. In version 3 of arXiv:2011.01632, bounds on the decaying dark matter component are significantly relaxed. Since our fiducial values are comfortably consistent with the corrected bounds, our conclusions remain unchanged
Fieldnotes
Creators: name: Beier, Christine
name: Michael, Lev
name: Piqueras-Brunet, Marta
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: anb

description: Contains three PDFs corresponding to one scanned notebook each for researchers Beier, Michael, and Piqueras-Brunet. All contain handwritten notes covering:
* Elicitation of Andoa/Katsakáti, with glosses in local Spanish (closest to Loreto-Ucayali Spanish [spq]) and local Quechua (closest to Southern Pastaza Quechua [qup]).
* Participant information, logistical notes, team discussion notes, and planning of project output (see bundle 007) in English.
* Analysis and planning notes in English and local Spanish.
In addition, Beier's notes include information based on data from Peeke's 1952 unpublished fieldnotes (bundle 009).
Central exclusive production of $W$ boson pairs in $pp$ collisions at the LHC in hadronic and semi-leptonic final states
Creators: name: Baldenegro, C.
name: Biagi, G.
name: Legras, G.
name: Royon, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a phenomenology study on central exclusive production of $W^+W^-$ boson pairs in proton-proton collisions at the Large Hadron Collider at 14 TeV using the forward proton detectors, such as the ATLAS Forward Proton or the CMS-TOTEM Precision Proton Spectrometer detectors. Final states where at least one of the $W$ bosons decay hadronically in a large-radius jet are considered. The latter extends previous efforts that consider solely leptonic final states. A measurement of exclusive $W^+W^-$ also allows us to further constrain anomalous quartic gauge boson interactions between photons and $W$ bosons. Expected limits on anomalous quartic gauge couplings $a_{0,C}^W$ associated to dimension-six effective operators are derived for the hadronic, semi-leptonic, and leptonic final states. It is found that the couplings can be probed down to one-dimensional values of $a_{0}^W = 3.7\times 10^{-7}$ GeV$^{-2}$ and $a_{C}^W = 9.2 \times 10^{-7}$ GeV$^{-2}$ at $95\%$ CL at an integrated luminosity of 300 fb$^{-1}$ by combining all final states, compared to values of about $a_{0}^W = 4\times 10^{-6}$ GeV$^{-2}$ and $a_{C}^W = 1\times 10^{-5}$ GeV$^{-2}$ at 95\% CL expected for the leptonic channel alone.
QUESTDB: a database of highly-accurate excitation energies for the electronic structure community
Creators: name: Véril, Mickaël
name: Scemama, Anthony
name: Caffarel, Michel
name: Lipparini, Filippo
name: Boggio-Pasqua, Martial
name: Jacquemin, Denis
name: Loos, Pierre-François
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We describe our efforts of the past few years to create a large set of more than 500 highly-accurate vertical excitation energies of various natures ($π\to π^*$, $n \to π^*$, double excitation, Rydberg, singlet, doublet, triplet, etc) in small- and medium-sized molecules. These values have been obtained using an incremental strategy which consists in combining high-order coupled cluster and selected configuration interaction calculations using increasingly large diffuse basis sets in order to reach high accuracy. One of the key aspect of the so-called QUEST database of vertical excitations is that it does not rely on any experimental values, avoiding potential biases inherently linked to experiments and facilitating theoretical cross comparisons. Following this composite protocol, we have been able to produce theoretical best estimate (TBEs) with the aug-cc-pVTZ basis set for each of these transitions, as well as basis set corrected TBEs (i.e., near the complete basis set limit) for some of them. The TBEs/aug-cc-pVTZ have been employed to benchmark a large number of (lower-order) wave function methods such as CIS(D), ADC(2), CC2, STEOM-CCSD, CCSD, CCSDR(3), CCSDT-3, ADC(3), CC3, NEVPT2, and others (including spin-scaled variants). In order to gather the huge amount of data produced during the QUEST project, we have created a website [https://lcpq.github.io/QUESTDB_website] where one can easily test and compare the accuracy of a given method with respect to various variables such as the molecule size or its family, the nature of the excited states, the type of basis set, etc. We hope that the present review will provide a useful summary of our effort so far and foster new developments around excited-state methods.
description: 44 pages, 5 figures, 4 Tables, supplementary information available at https://doi.org/10.5281/zenodo.4297012
Study of the SU(3)_c X SU(3)_L X U(1)_X model with the minimal scalar sector
Creators: name: Gutierrez, Diego A.
name: Ponce, William A.
name: Sanchez, Luis A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A study of the three-family local gauge group SU(3)_c X SU(3)_L X U(1)_X with right-handed neutrinos is carried out. We use the minimal scalar sector able to break the symmetry in a proper way and produce, at the same time, masses for the fermion fields. We embed the structure into a simple gauge group and, by using experimental results from the CERN LEP, SLAC linear collider and atomic parity violation data, we also constraint relevant parameters for the new neutral and charged currents. We discuss the mass spectrum for the gauge boson sector and for the spin 1/2 particles. With the use of discrete symmetries and the introduction of extra scalar fields, a consistent mass spectrum could be constructed.
description: RevTeX, 10 pages, 4 figures. Accepted for publication in Int. J. Mod. Phys. A
Melting of the stripe phases in the t-t'-U Hubbard model
Creators: name: Raczkowski, M.
name: Fresard, R.
name: Oles, A. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate melting of stripe phases in the overdoped regime x>0.3 of the two-dimensional t-t'-U Hubbard model, using a spin rotation invariant form of the slave boson representation. We show that the spin and charge order disappear simultaneously, and discuss a mechanism stabilizing bond-centered and site-centered stripe structures.
description: 2 pages, 1 figure
Grassmannian-parameterized solutions to direct-sum polygon and simplex equations
Creators: name: Dimakis, Aristophanes
name: Korepanov, Igor
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 15A24 (Primary) 15A75 (Secondary)

description: We consider polygon and simplex equations, of which the simplest nontrivial examples are pentagon (5-gon) and Yang--Baxter (2-simplex), respectively. We examine the general structure of (2n+1)-gon and 2n-simplex equations in direct sums of vector spaces. Then we provide a construction for their solutions, parameterized by elements of the Grassmannian Gr(n+1,2n+1).
description: 26 pages, 5 tikz figures. v4: Introduction re-written, Discussion added in the end
Deflection of Light Around a Rotating BTZ Black Hole
Creators: name: Kala, Shubham
name: Nandan, Hemwati
name: Sharma, Prateek
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a detailed study of gravitational lensing around a rotating BTZ black hole in (2+1) dimensional gravity. The study of orbits for massless test particle around this BH spacetime is performed to describe the nature of cosmological constant in lower dimensions. We study the effect of cosmological constant on the photon orbit in view of other critical parameters. The bending angle of light is studied in view of different values of cosmological constant for direct and retrograde motion of test particles. It is being observed that the bending angle slightly decreases as the value of cosmological constant increases in the negative region.
Factorized lightcone expansion of conformal blocks
Creators: name: Li, Wenliang
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a factorized decomposition of 4-point scalar conformal blocks near the lightcone, which applies to arbitrary intermediate spin and general spacetime dimensions. Then we discuss the systematic expansion in large intermediate spin and the resummations of the large-spin tails of Regge trajectories. The basic integrals for the Lorentzian inversion are given by Wilson functions.
description: 17 pages; v2: references updated, discussions improved
Balance of baryon number in the quark coalescence model
Creators: name: Bialas, A.
name: Rafelski, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The charge and baryon balance functions are studied in the coalescence hadronization mechanism of quark-gluon plasma. Assuming that in the plasma phase the $q\bar{q}$ pairs form uncorrelated clusters whose decay is also uncorrelated, one can understand the observed small width of the charge balance function in the Gaussian approximation. The coalescence model predicts even smaller width of the baryon-antibaryon balance function: $σ_{B\bar{B}}/σ_{+-}= \sqrt{2/3}$.
Symplectic quantization II: dynamics of space-time quantum fluctuations and the cosmological constant
Creators: name: Gradenigo, Giacomo
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The symplectic quantization scheme proposed for matter scalar fields in the companion paper "Symplectic quantization I" is generalized here to the case of space-time quantum fluctuations. Symplectic quantization considers an explicit dependence of the metric tensor $g_{μν}$ on an additional time variable, named "proper time" at variance with the coordinate time of relativity. The physical meaning of proper time is to label the sequence of $g_{μν}$ quantum fluctuations at a given point of the four-dimensional space-time continuum. For this reason symplectic quantization necessarily incorporates a new degree of freedom, the derivative $\dot{g}_{μν}$ of the metric field with respect to proper time, corresponding to the conjugated momentum $π_{μν}$. Symplectic quantization describes the quantum fluctuations of gravity by means of the symplectic dynamics generated by a generalized action functional $\mathcal{A}[g_{μν},π_{μν}] = \mathcal{K}[g_{μν},π_{μν}] - S[g_{μν}]$, playing formally the role of a Hamilton function, where $S[g_{μν}]$ is the Einstein-Hilbert action and $\mathcal{K}[g_{μν},π_{μν}]$ is a new term including the kinetic degrees of freedom of the field. Such an action allows us to define a pseudo-microcanonical ensemble for the quantum fluctuations of $g_{μν}$, built on the conservation of the generalized action $\mathcal{A}[g_{μν},π_{μν}]$ rather than of energy. $S[g_{μν}]$ plays the role of a potential term along the symplectic action-preserving dynamics: its fluctuations are the quantum fluctuations of $g_{μν}$. It is shown how symplectic quantization maps to the path-integral approach to gravity. By doing so we explain how the integration over the conjugated momentum field $π_{μν}$ gives rise to a cosmological constant term in the path-integral.
description: 11 pages
Katsakáti: El idioma antiguo del pueblo de Andoas
Creators: name: Mucushua, Juan
name: Sandi, María
name: Beier, Christine
name: Escamilla, Ramón
name: Michael, Lev
name: Piqueras-Brunet, Marta
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: anb

description: This bundle contains two PDFs of the booklet produced and printed by the research team as the output of fieldwork, and immediately delivered to participants and other community members in Andoas Viejo. One PDF is the original computer-generated file; the other is a scan of the printed booklet, which includes illustrations that were pasted into the printed version. See the PDFs for authorship and other attributions.
Free Fermions, vertex Hamiltonians, and lower-dimensional AdS/CFT
Creators: name: de Leeuw, Marius
name: Paletta, Chiara
name: Pribytok, Anton
name: Retore, Ana L.
name: Torrielli, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we first demonstrate explicitly that the new models of integrable nearest-neighbour Hamiltonians recently introduced in PRL 125 (2020) 031604 satisfy the so-called free fermion condition. This both implies that all these models are amenable to reformulations as free fermion theories, and establishes the universality of this condition. We explicitly recast the transfer matrix in free fermion form for arbitrary number of sites in the 6-vertex sector, and on two sites in the 8-vertex sector, using a Bogoliubov transformation. We then put this observation to use in lower-dimensional instances of AdS/CFT integrable R-matrices, specifically pure Ramond-Ramond massless and massive AdS_3, mixed-flux relativistic AdS_3 and massless AdS_2. We also attack the class of models akin to AdS_5 with our free fermion machinery. In all cases we use the free fermion realisation to greatly simplify and reinterpret a wealth of known results, and to provide a very suggestive reformulation of the spectral problem in all these situations.
description: 51 pages, no figures; v2: typos fixed and comments added; v3: 54 pages, typos and errors fixed, added comments, homogenised notation, added appendix
Birmelé, André (Hrsg.), Konkordie und Ökumene - Die Leuenberger Kirchengemeinschaft in der gegenwärtigen ökumenischen Situation
Creators: name: Gang, Dietrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 4 (1988): Ökumenische Rundschau, Band 37, Heft 4
Preparing isomerically pure beams of short-lived nuclei at JYFLTRAP
Creators: name: Eronen, T.
name: Elomaa, V. -V.
name: Hager, U.
name: Hakala, J.
name: Jokinen, A.
name: Kankainen, A.
name: Rahaman, S.
name: Rissanen, J.
name: Weber, C.
name: Aysto, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A new procedure to prepare isomerically clean samples of ions with a mass resolving power of more than 100,000 has been developed at the JYFLTRAP tandem Penning trap system. The method utilises a dipolar rf-excitation of the ion motion with separated oscillatory fields in the precision trap. During a subsequent retransfer to the purification trap, the contaminants are rejected and as a consequence, the remaining bunch is isomerically cleaned. This newly-developed method is suitable for very high-resolution cleaning and is at least a factor of five faster than the methods used so far in Penning trap mass spectrometry.
description: 5 pages, 7 figures, submitted to EMIS2007 Conference proceedings, Nucl. Instrum. Meth. Phys. Res. B (2007)
Brandt, Hermann (Hrsg.), Kirchliches Lehren in ökumenischer Verpflichtung
Creators: name: Urban, Hans Jörg
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 4 (1988): Ökumenische Rundschau, Band 37, Heft 4
Theory of Photoinduced Phase Transitions
Creators: name: Yonemitsu, Kenji
name: Nasu, Keiichiro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Theories of photoinduced phase transitions have developed along with the progress in experimental studies, especially concerning their nonlinear characters and transition dynamics. At an early stage, paths from photoinduced local structural distortions to global ones are explained in classical statistical models. Their dynamics are governed by transition probabilities and inevitably stochastic, but they were sufficient to describe coarse-grained time evolutions. Recently, however, a variety of dynamics including ultrafast ones are observed in different electronic states. They are explained in relevant electronic models. In particular, a coherent lattice oscillation and coherent motion of a macroscopic domain boundary need appropriate interactions among electrons and lattice displacements. Furthermore, some transitions proceed almost in one direction, which can be explained by considering relevant electronic processes. We describe the history of theories of photoinduced phase transitions and discuss a future perspective.
description: 8 pages, 9 figures, to appear in J. Phys. Soc. Jpn
The quest for the most effective technology-based instructional model : the operational definition of technology enhanced instruction
Creators: name: Farenholtz, Aubry Gustave
Publisher: name: University of British Columbia
Year: 2009

description: Educators need access to a technology-based instructional model that provides opportunities for students to develop an expanded set of skills, accommodates students' unique learning styles and rates, and which allows teachers flexibility in adapting the model to their own instructional styles. The thesis presents a concise operational definition of Technology Enhancement as it applies to instruction in secondary school classrooms. The definition of Technology Enhancement then forms the basis for developing criteria that can be used to establish and evaluate Technology Enhanced Instruction (TEI) programs in secondary schools. These criteria will also enable educators to ensure the longevity and continuity of the program in their schools, thus maximizing the educational benefits afforded by technology, while minimizing the potential capital costs. Technology will continue to pervade all aspects of educational institutions; educators are faced with the challenge of making effective use of technology and helping students to develop life-long learning skills without discarding established, effective educational strategies.
Geometrical aspects of entanglement
Creators: name: Leinaas, Jon Magne
name: Myrheim, Jan
name: Ovrum, Eirik
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study geometrical aspects of entanglement, with the Hilbert--Schmidt norm defining the metric on the set of density matrices. We focus first on the simplest case of two two-level systems and show that a ``relativistic'' formulation leads to a complete analysis of the question of separability. Our approach is based on Schmidt decomposition of density matrices for a composite system and non-unitary transformations to a standard form. The positivity of the density matrices is crucial for the method to work. A similar approach works to some extent in higher dimensions, but is a less powerful tool. We further present a numerical method for examining separability, and illustrate the method by a numerical study of bound entanglement in a composite system of two three-level systems.
description: 31 pages, 6 figures
Moments $n=2$ and $n=3$ of the Wilson twist-two operators at three loops in the RI${}'$/SMOM scheme
Creators: name: Kniehl, Bernd A.
name: Veretin, Oleg L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the renormalization of the matrix elements of the twist-two non-singlet bilinear quark operators, contributing to the $n=2$ and $n=3$ moments of the structure functions, at next-to-next-to-next-to-leading order in QCD perturbation theory at the symmetric subtraction point. This allows us to obtain conversion factors between the $\overline{\rm MS}$ scheme and the regularization-invariant symmetric momentum subtraction (RI/SMOM, RI${}'$/SMOM) schemes. The obtained results can be used to reduce errors in determinations of moments of structure functions from lattice QCD simulations. The results are given in Landau gauge.
description: 14 pages, 1 figure, minor changes, references added, matches journal version
Bouncing cosmology in a curved braneworld
Creators: name: Banerjee, Indrani
name: Paul, Tanmoy
name: SenGupta, Soumitra
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the possibility of a non-singular bounce in our universe from a warped braneworld scenario with dynamical branes and a non-zero brane cosmological constant. Such models naturally incorporate a scalar sector known as the radion originating from the modulus of the theory. The presence of brane cosmological constant renders the branes to be non-flat and gives rise to a potential and a non-canonical kinetic term for the radion field in the four dimensional effective action. The kinetic term exhibits a phantom-like behavior within the domain of evolution of the modulus which leads to a violation of the null-energy condition often observed in a bouncing universe. The interplay of the radion potential and kinetic term enables the evolution of the radion field from a normal to a phantom regime where the universe transits from a contracting era to an expanding epoch through a non-singular bounce. Analysis of the scalar and tensor perturbations over such background evolution reveal that the primordial observables e.g., the amplitude of scalar perturbations $\mathcal{A}_s$, tensor to scalar ratio $r$ and the scalar spectral index $n_s$ are in agreement with the current constraints reported by the Planck satellite. The implications are discussed.
description: JCAP accepted
Logical foundation of theoretical physics
Creators: name: Quznetsov, G. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: This is the logical foundation for for Relativity Theory, Probability Theory, and for Quantum Theory. Contents is the following: 1 Introduction. 2 Classical logic. 3 Time and space. 3.1 Recorders. 3.2 Time. 3.3 Space. 3.4 Relativity. 4. Probability. 4.1 B-functions. 4.2 Independent tests. 4.3 Function of probability. 4.4 Conditional probability. 4.5 Classical probability 4.6 B-functions and classical propositional logic. 4.7 Consistency of the probability function. 4.7.1 Nonstandard numbers. 4.7.2 Model. 5. Quantum theory. 5.1 Events and the moving equations. 5.2 Rotations of the x5Ox4 system and B-bosonn. 5.3 Masses. 5.4 The one-mass states, particles and antiparticles. 5.5 The two-masses states. 5.5.1 Neutrinno. 5.5.2 Electroweak transformations. 5.6 Rotations of the Cartesian coordinates system and quarrks. 5.7 Gustatory pentads. 5.8 Two events. 5.9 The dimension of physical space. 5.10 The events-probability interpretation of Quantum Theory. 6. Conclusion.
description: LaTex, no figures, 114 pages, in Russian
Phase transitions between helices, vortices, and hedgehogs driven by spatial anisotropy in chiral magnets
Creators: name: Shimizu, Kotaro
name: Okumura, Shun
name: Kato, Yasuyuki
name: Motome, Yukitoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Superpositions of spin helices can yield topological spin textures, such as two-dimensional vortices and skyrmions, and three-dimensional hedgehogs. Their topological nature and spatial dimensionality depend on the number and relative directions of the constituent helices. This allows mutual transformation between the topological spin textures by controlling the spatial anisotropy. Here we theoretically study the effect of anisotropy in the magnetic interactions for an effective spin model for chiral magnetic metals. By variational calculations for both cases with triple and quadruple superpositions, we find that the hedgehog lattices, which are stable in the isotropic case, are deformed by the anisotropy, and eventually changed into other spin textures with reduced dimension, such as helices and vortices. We also clarify the changes of topological properties by tracing the real-space positions of magnetic monopoles and antimonopoles as well as the emergent magnetic field generated by the noncoplanar spin textures. Our results suggest possible control of the topological spin textures, e.g., by uniaxial pressure and chemical substitution in chiral materials.
A qualitative perspective on the dynamics of a single-Cooper-pair box with a phase-damped cavity
Creators: name: Abdel-Aty, Mahmoud
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a recent paper Dajka, et.al., [J. Phys. A \textbf{40}, F879 (2007)] predicted that some composite systems can be entangled forever even if coupled with a thermal bath. We analyze the transient entanglement of a single-Cooper-pair box biased by a classical voltage and irradiated by a quantized field and find the unusual feature that the phase-damped cavity can lead to a long-lived entanglement. The results show an asymptotic value of the idempotency defect (concurrence) which embodies coherence loss (entanglement survival), independent of the interaction development by dependent critically on environment.
description: 15 pages, 4 figures, some modifications have been done
Mean-field phase diagram of interacting e_g electrons
Creators: name: Raczkowski, M.
name: Oles, A. M.
name: Fresard, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the magnetic phase diagram of the two-dimensional model for e_g electrons which describes layered nickelates. One finds a generic tendency towards magnetic order accompanied by orbital polarization. For two equivalent orbitals with diagonal hopping such orbitally polarized phases are induced by finite crystal field.
description: 2 pages, 2 figures
Urban, Hans Jörg (Hrsg.) / Wagner, Harald (Hrsg.), Handbuch der Ökumenik
Creators: name: Gaese, Heino
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 4 (1988): Ökumenische Rundschau, Band 37, Heft 4
Constructing minimally 3-connected graphs
Creators: name: Costalonga, J. P.
name: Kingan, R. J.
name: Kingan, S. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: F.2; G.2
subject: 05C85 (Primary) 05C83 (Secondary)

description: A $3$-connected graph is minimally 3-connected if removal of any edge destroys 3-connectivity. We present an algorithm for constructing minimally 3-connected graphs based on the results in (Dawes, JCTB 40, 159-168, 1986) using two operations: adding an edge between non-adjacent vertices and splitting a vertex. In order to test sets of vertices and edges for 3-compatibility, which depends on the cycles of the graph, we develop a method for obtaining the cycles of $G'$ from the cycles of $G$, where $G'$ is obtained from $G$ by one of the two operations above. We eliminate isomorphs using certificates generated by McKay's isomorphism checker nauty. The algorithm consecutively constructs the non-isomorphic minimally 3-connected graphs with $n$ vertices and $m$ edges from the non-isomorphic minimally 3-connected graphs with $n-1$ vertices and $m-2$ edges, $n-1$ vertices and $m-3$ edges, and $n-2$ vertices and $m-3$ edges.
Fieldwork photographs
Creators: name: Arahuanaza, Dionisia
name: Arahuanaza, Lidia
name: Beier, Christine
name: Escamilla, Ramón
name: Michael, Lev
name: Mucushua, Juan
name: Piqueras-Brunet, Marta
name: Sandi, María
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: anb

description: Contains 15 JPG files, all photos from fieldwork. Names of files indicate the following about those depicted: CMB = Christine Beier; RME = Ramón Escamilla; LDM = Lev Michael; MPB = Marta Piqueras-Brunet; Juan Mucushua = JM; MS = María Sandi; DA = Dionisia Arahuanaza; LA = Lidia Arahuanaza.