cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Instantaneous Gelation in Smoluchowski's Coagulation Equation Revisited
Creators: name: Ball, Robin C.
name: Connaughton, Colm
name: Stein, Thorwald H. M.
name: Zaboronski, Oleg
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the solutions of the Smoluchowski coagulation equation with a regularisation term which removes clusters from the system when their mass exceeds a specified cut-off size, M. We focus primarily on collision kernels which would exhibit an instantaneous gelation transition in the absence of any regularisation. Numerical simulations demonstrate that for such kernels with monodisperse initial data, the regularised gelation time decreases as M increases, consistent with the expectation that the gelation time is zero in the unregularised system. This decrease appears to be a logarithmically slow function of M, indicating that instantaneously gelling kernels may still be justifiable as physical models despite the fact that they are highly singular in the absence of a cut-off. We also study the case when a source of monomers is introduced in the regularised system. In this case a stationary state is reached. We present a complete analytic description of this regularised stationary state for the model kernel, K(m_1,m_2)=max{m_1,m_2}^v, which gels instantaneously when M tends to infinity if v>1. The stationary cluster size distribution decays as a stretched exponential for small cluster sizes and crosses over to a power law decay with exponent v for large cluster sizes. The total particle density in the stationary state slowly vanishes as (Log M^(v-1))^-1/2 when M gets large. The approach to the stationary state is non-trivial : oscillations about the stationary state emerge from the interplay between the monomer injection and the cut-off, M, which decay very slowly when M is large. A quantitative analysis of these oscillations is provided for the addition model which describes the situation in which clusters can only grow by absorbing monomers.
description: 11 pages, 7 figures. Revised version extended to included a quantitative description of the oscillatory approach to the stationary state for the addition model
Structuring and organizing project data- File naming conventions
Creators: name: Atemkeng, Maureen Fonji
Publisher: name: Zenodo
Year: 2023

description: The workshop covered naming conventions for folders and files, file versioning, and data structuring for storage and publishing. It's not surprising that some projects still have no file and folder naming conventions. It is critical that each project team agrees on how to name their files and folders. However, the difficulty arises from the fact that scientists come from a variety of backgrounds, and everyone believes that their file naming style is the best and that no one should change it.
What we believe is best is for project leaders to develop file and folder naming rules with team members and explain the benefits of such naming rules to the team in order to pique team members' interest in adhering to the rules.
The advantages of following file naming conventions are twofold: To begin with, your files will be machine and human readable, and file search and sorting will be very simple. Setting or adhering to file naming conventions will allow you to be well organised as an individual. You will be able to easily identify files and group files with similar contents together. Last but not least, other team members will understand what your research is about, which leads to greater appreciation.
Galactic Outflows and Photoionization Heating in the Reionization Epoch
Creators: name: Finlator, K.
name: Davé, R.
name: Özel, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We carry out a new suite of cosmological radiation hydrodynamic simulations and explore the relative impacts on reionization-epoch star formation of galactic outflows and photoionization heating. By itself, an extragalactic ultraviolet background (EUVB) suppresses the luminosity function by less than 50% at z=6, overproducing the observed galaxy abundance by a factor of 3-5. Galactic outflows restore agreement with observations without preventing Population II star formation from reionizing the Universe by z=6. The resulting EUVB suppresses star formation in halos with virial temperatures below 10^5K but has a weaker impact in more massive halos. Nonetheless, the low-mass halos contribute up to 50% of all ionizing photons owing to the EUVB's inhomogeneity. Overall, star formation rate scales as halo mass M_h to the 1.3-1.4 in halos with $M_h=10^{8.2--10.2}\msun$. This is a steeper dependence than is often assumed in reionization models, boosting the expected power spectrum of 21 centimeter fluctuations on large scales. The luminosity function rises steeply to at least M_1600=-13, indicating that reionization was driven by faint galaxies (M_1600 >= -15) that have not yet been observed. Our models cannot simultaneously explain observations of galaxies, the cosmic microwave background, and the intergalactic medium. Increased dynamic range will alleviate the existing discrepancies, but observations may still require additional physics such as a variable ionizing escape fraction (abridged).
description: 23 pages, 15 Figures, accepted to ApJ
Formation of caustics in Dirac-Born-Infeld type scalar field systems
Creators: name: Goswami, U. D.
name: Nandan, H.
name: Sami, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the formation of caustics in Dirac-Born-Infeld type scalar field systems for generic classes of potentials, viz., massive rolling scalar with potential, $V(ϕ)=V_0e^{\pm \frac{1}{2} M^2 ϕ^2}$ and inverse power-law potentials with $V(ϕ)=V_0/ϕ^n,~0
description: 16 pages, 14 figures, major revision, conclusions strengthen, to appear in PRD
Application of Bayesian model averaging to measurements of the primordial power spectrum
Creators: name: Parkinson, David
name: Liddle, Andrew R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmological parameter uncertainties are often stated assuming a particular model, neglecting the model uncertainty, even when Bayesian model selection is unable to identify a conclusive best model. Bayesian model averaging is a method for assessing parameter uncertainties in situations where there is also uncertainty in the underlying model. We apply model averaging to the estimation of the parameters associated with the primordial power spectra of curvature and tensor perturbations. We use CosmoNest and MultiNest to compute the model Evidences and posteriors, using cosmic microwave data from WMAP, ACBAR, BOOMERanG and CBI, plus large-scale structure data from the SDSS DR7. We find that the model-averaged 95% credible interval for the spectral index using all of the data is 0.940 < n_s < 1.000, where n_s is specified at a pivot scale 0.015 Mpc^{-1}. For the tensors model averaging can tighten the credible upper limit, depending on prior assumptions.
description: 7 pages with 7 figures included
Limitations on quantum dimensionality reduction
Creators: name: Harrow, Aram W.
name: Montanaro, Ashley
name: Short, Anthony J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Johnson-Lindenstrauss Lemma is a classic result which implies that any set of n real vectors can be compressed to O(log n) dimensions while only distorting pairwise Euclidean distances by a constant factor. Here we consider potential extensions of this result to the compression of quantum states. We show that, by contrast with the classical case, there does not exist any distribution over quantum channels that significantly reduces the dimension of quantum states while preserving the 2-norm distance with high probability. We discuss two tasks for which the 2-norm distance is indeed the correct figure of merit. In the case of the trace norm, we show that the dimension of low-rank mixed states can be reduced by up to a square root, but that essentially no dimensionality reduction is possible for highly mixed states.
description: 17 pages; v2: typo fixes and clarifications
Young Boy Receiving Diploma, 1957
Creators: name: Kelsey, Carleton
name: Amagansett Historical Association
Publisher: name: Unknown
Year: 1957
Subjects: Photographs
Boys
Children
Graduation ceremonies
Diplomas
Men

description: This image shows a young boy in a suit jacket shaking hands with a man and receiving a diploma. This is the Amagansett Grade School Graduation Ceremony of 1957. This photograph was either taken or collected by Amagansett historian and librarian Carleton Kelsey.
description: This photograph is part of the collection of the Carleton Kelsey Collection of the Amagansett Historical Association. Kelsey was a local historian and librarian who collected photographs from others to add to the many photographs he took of the community himself.
2D massless QED Hall half-integer conductivity and graphene
Creators: name: Martínez, A. Pérez
name: Querts, E. Rodriguez
name: Rojas, H. Pérez
name: Gaitan, R.
name: Romo, S. Rodriguez
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Starting from the photon self-energy tensor in a magnetized medium, the 3D complete antisymmetric form of the conductivity tensor is found in the static limit of a fermion system $C$ non-invariant under fermion-antifermion exchange. The massless relativistic 2D fermion limit in QED is derived by using the compactification along the dimension parallel to the magnetic field. In the static limit and at zero temperature the main features of quantum Hall effect (QHE) are obtained: the half-integer QHE and the minimum value proportional to $e^2/h$ for the Hall conductivity . For typical values of graphene the plateaus of the Hall conductivity are also reproduced.
description: 14 pages, 2 figures
Cumulant Approach of Arbitrary Truncated Levy Flight
Creators: name: Vinogradov, Dmitry V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: The problem of an arbitrary truncated Levy flight description using the method of cumulant approach has been solved. The set of cumulants of the truncated Levy distribution given the assumption of arbitrary truncation has been found. The influence of truncation shape on the truncated Levy flight properties in the Gaussian and the Levy regimes has been investigated.
description: 9 pages
Isotope Shift Measurements of Stable and Short-Lived Lithium Isotopes for Nuclear Charge Radii Determination
Creators: name: Nörtershäuser, W.
name: Sánchez, R.
name: Ewald, G.
name: Dax, A.
name: Behr, J.
name: Bricault, P.
name: Bushaw, B. A.
name: Dilling, J.
name: Dombsky, M.
name: Drake, G. W. F.
name: Götte, S.
name: Kluge, H. -J.
name: Kühl, Th.
name: Lassen, J.
name: Levy, C. D. P.
name: Pachucki, K.
name: Pearson, M.
name: Puchalski, M.
name: Wojtaszek, A.
name: Yan, Z. -C.
name: Zimmermann, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Changes in the mean-square nuclear charge radii along the lithium isotopic chain were determined using a combination of precise isotope shift measurements and theoretical atomic structure calculations. Nuclear charge radii of light elements are of high interest due to the appearance of the nuclear halo phenomenon in this region of the nuclear chart. During the past years we have developed a new laser spectroscopic approach to determine the charge radii of lithium isotopes which combines high sensitivity, speed, and accuracy to measure the extremely small field shift of an 8 ms lifetime isotope with production rates on the order of only 10,000 atoms/s. The method was applied to all bound isotopes of lithium including the two-neutron halo isotope Li-11 at the on-line isotope separators at GSI, Darmstadt, Germany and at TRIUMF, Vancouver, Canada. We describe the laser spectroscopic method in detail, present updated and improved values from theory and experiment, and discuss the results.
description: 34 pages, 24 figures, 14 tables
Development and Application of a Epidemiology Needs Assessment Tool for Animal Disease Intelligence in Asia
Creators: name: Castellan, David M.
name: Bui, Thuy
name: Tum, Sothyra
name: Bisht, Khadak
name: Tshering, Pasang
name: Muhammad, Akram
name: Dissanayake, Ravi Bandara
name: Minh, Phan Quang
name: Pham, Long Thanh
name: Newman, Scott H
name: Loth, Leo
name: Schoonman, Luuk
name: McGrane, James
name: Kalpravidh, Wantanee
Publisher: name: figshare
Year: 2021
Subjects: subject: 79999 Agricultural and Veterinary Sciences not elsewhere classified
subject: FOS: Other agricultural sciences

description: A semi-structured, semi-quantitative MS Excel© based assessment tool was developed and pilot tested to assess needs and gaps at national, subnational and local levels in Viet Nam and Indonesia through consultative meetings. Capacity elements that were assessed at all three levels include institutional structures and relationships, human resource development, disease programs, surveillance, outbreak investigation, epidemiology training conducted, training resources, post-training follow up, training needs, skills matrix gap analysis, case study materials and evidence of peer-reviewed publications. Responses under each element were mapped to systematically develop a final report that was provided to key government technical staff and decision makers to inform national strategic plans for epidemiology capacity development.
MPEC 2023-X136 : 2021 AH3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Revisiting the Question of Literary Patronage under the Early Safavids
Creators: name: Beers, Theodore S.
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Persian literature
subject: Iranian history
subject: Safavid dynasty
subject: court patronage
subject: 800 Literature::890 Literatures of other languages::893 Non-Semitic Afro-Asiatic literatures

description: This article reviews an old debate in Persian literary history, surrounding the judgment of early modern poetry and, in particular, the legacy of the Safavid dynasty, and argues that a few of the questions over which scholars once disagreed have not been resolved to the extent that might be suspected. The general narrative that prevailed for most of the twentieth century, in which Persian lyric poetry of the early modern era was criticized as decadent and the Safavids were denounced for having abandoned their traditional duty to promote arts and letters, is now rightly considered obsolete. As the field has developed a more mature approach to these issues, however, the question of patronage at the Safavid court has been set aside more than it has been settled. We still have not reached a comprehensive understanding of the transformations that took place in Persian literary culture from the tenth/sixteenth century onward. The migration of scores of Iranian poets to Mughal India is recognized as a key development, but the impact of the contemporary situation in Safavid lands—including, perhaps, a relative lack of patronage—merits reconsideration.
Spotting the misaligned outflows in NGC 1068 using X-ray polarimetry
Creators: name: Goosmann, Rene W.
name: Matt, Giorgio
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We model the expected X-ray polarisation induced by complex reprocessing in the active nucleus of the Seyfert-2 galaxy NGC 1068. Recent analysis of infrared interferometry observations suggests that the ionised outflows ejected by the central engine are not aligned with the symmetry axis of the obscuring torus. This conclusion was obtained by extrapolating the apparent orientation of the narrow line region to the inner parts of the ionisation cones. We show that future measurements of the soft X-ray polarisation vector unambiguously determine the orientation of the ionisation cones. Furthermore, X-ray polarimetry across a broad photon energy range may independently verify the misalignment between the ionisation cones and the axis of the torus. To model the expected polarisation percentage and position angle, we apply the radiative transfer code STOKES. Reprocessing of the primary X-ray radiation takes place in the accretion disc, the surrounding equatorial torus and the inclined, ionised outflows. We also examine additional equatorial scattering occurring in between the accretion disc and the inner surfaces of the torus. Radiative coupling between the different reprocessing components is computed coherently. The resulting polarisation properties depend on the optical depth of the reprocessing regions and on the viewing angle of the observer. We show that even under unfavourable conditions the misalignment of the outflows with respect to the torus axis can be determined from a rotation of the polarisation position angle between softer and harder X-rays. We argue that the misalignment of the outflows with respect to the torus axis in NGC 1068 may be constrained by a future X-ray mission if equipped with a broad band polarimeter.
description: 11 pages, 7 figures, 2 tables, accepted by MNRAS, new and revised calculations were added
Phytoseiulus macropilis Banks 1904
Creators: name: Argolo, Poliane Sá
name: Vital Santos, Renata M.
name: Leão Bittencourt, Maria A.
name: Da Silva Noronha, Aloyséia C.
name: De Moraes, Gilberto J.
name: Oliveira, Anibal Ramadan
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Phytoseiidae
Phytoseiulus
Phytoseiulus macropilis

description: Phytoseiulus macropilis (Banks, 1904)
 Specimens examined. Fazenda Liberdade, H. rostrata, February 2007 (1 female); Fazenda Monte Alegre, H. rostrata, January 2008 (1 female), H. wagneriana, September 2006 (1 female), January 2008 (1 female).
 Four females measured. Dorsal shield 318 (290–332) long, 215 (210–220) wide, j1 25 (23–27), j3 35 (34–37), j4 55 (49–61), j5 69 (65–76), j6 143 (137–153), J5 6 (5–6), z2 13 (12–15), z4 54 (49–61), z5 11 (9–12), Z1 104 (92– 116), Z4 125 (116–137), Z5 112 (107–119), s4 162 (156–168), S5 27 (24–31), r3 23 (21–24), R1 23 (21–26); distances between St1–St3 71 (67–76), St2–St2 76 (68–82), St5–St5 85 (77–90); ventrianal shield 94 (92–95) long, 65 (61–67) wide at level of ZV2 and 74 (72–76) wide at level of anus; movable cheliceral digit 24 long; fixed cheliceral digit 21 long, calyx of spermatheca 33 (31–34) long; Sge I 51 (49–52), Sge II 31 (30–31), Sge III 41 (34– 55), Sti III 29 (27–31), Sge IV 72 (67–76), Sti IV 35 (34–37), St IV 99 (88–107).
 Remarks. No measurements were given in the original description of this species. Measurements of the specimens collected agree with the redescription given by Schuster & Pritchard (1963), except for the longer j6 (110) and the shorter S5 (40). Specimens collected in this study have wider dorsal shield than reported for specimens from São Paulo by Moraes et al. (2013) [179 (175–187)].
description: Published as part of Argolo, Poliane Sá, Vital Santos, Renata M., Leão Bittencourt, Maria A., Da Silva Noronha, Aloyséia C., De Moraes, Gilberto J. & Oliveira, Anibal Ramadan, 2017, Phytoseiid mites (Acari: Phytoseiidae) associated with tropical ornamental plants, with a checklist and a key to the species of Bahia, Brazil, pp. 345-364 in Zootaxa 4258 (4) on page 348, DOI: 10.11646/zootaxa.4258.4.3, http://zenodo.org/record/570106
Hard Pion Chiral Perturbation Theory for $B\toπ$ and $D\toπ$ Formfactors
Creators: name: Bijnens, Johan
name: Jemos, Ilaria
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use one-loop Heavy Meson Chiral Perturbation Theory (HMCHPT) as well as a relativistic formulation to calculate the chiral logarithms $m^2_π\log{\left(m^2_π/μ^2\right)}$ contributing to the formfactors of the semileptonic $B\rightarrow π$ decays at momentum transfer $q^2$ away from $q^2_\mathrm{max}=(m_B-m_π)^2$. We give arguments why this chiral behavior is reliable even in the energy regime with hard or fast pions. These results can be used to extrapolate the formfactors calculated on the lattice to lower light meson masses.
description: 16 pages, two wrong statements about relation relativistic-heavy meson formfactors changed and (a lot of) misprints corrected. These include misprints in the main results
Domains of time-dependent density-potential mappings
Creators: name: Penz, Markus
name: Ruggenthaler, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The key element in time-dependent density functional theory is the one-to-one correspondence between the one-particle density and the external potential. In most approaches this mapping is transformed into a certain type of Sturm-Liouville problem. Here we give conditions for existence and uniqueness of solutions and construct the weighted Sobolev space they lie in. As a result the class of v-representable densities is considerably widened with respect to previous work.
description: 7 pages
Higher order statistics in the annulus square billiard: transport and polyspectra
Creators: name: Rebuzzini, Laura
name: Artuso, Roberto
Publisher: name: arXiv
Year: 2010
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences
subject: 37A60 (Primary) 37A25 (Secondary)

description: Classical transport in a doubly connected polygonal billiard, i.e. the annulus square billiard, is considered. Dynamical properties of the billiard flow with a fixed initial direction are analyzed by means of the moments of arbitrary order of the number of revolutions around the inner square, accumulated by the particles during the evolution. An "anomalous" diffusion is found: the moment of order q exhibits an algebraic growth in time with an exponent different from q/2, like in the normal case. Transport features are related to spectral properties of the system, which are reconstructed by Fourier transforming time correlation functions. An analytic estimate for the growth exponent of integer order moments is derived as a function of the scaling index at zero frequency of the spectral measure, associated to the angle spanned by the particles. The n-th order moment is expressed in terms of a multiple-time correlation function, depending on n-1 time intervals, which is shown to be linked to higher order density spectra (polyspectra), by a generalization of the Wiener-Khincin Theorem. Analytic results are confirmed by numerical simulations.
description: 23 pages, 5 figures
Evidence for B- -> tau- nu_bar with a Semileptonic Tagging Method
Creators: name: The Belle Collaboration
name: Hara, K.
name: Iijima, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a measurement of the decay B- -> tau- nu_bar using a data sample containing 657 million BB_bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. A sample of BB_bar pairs are tagged by reconstructing one B meson decaying semileptonically. We detect the B- -> tau- nu_bar candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be Br(B- -> tau- nu_bar) = [1.54+0.38-0.37(stat)+0.29-0.31(syst)]*10^-4. This result confirms the evidence for B- -> tau- nu_bar obtained in a previous Belle measurement that used a hadronic B tagging method.
description: 7 pages, 3 figures, corrected references, to appear in PRD-RC
Classical Effective Field Theory for Weak Ultra Relativistic Scattering
Creators: name: Kol, Barak
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Inspired by the problem of Planckian scattering we describe a classical effective field theory for weak ultra relativistic scattering in which field propagation is instantaneous and transverse and the particles' equations of motion localize to the instant of passing. An analogy with the non-relativistic (post-Newtonian) approximation is stressed. The small parameter is identified and power counting rules are established. The theory is applied to reproduce the leading scattering angle for either a scalar interaction field or electro-magnetic or gravitational; to compute some subleading corrections, including the interaction duration; and to allow for non-zero masses. For the gravitational case we present an appropriate decomposition of the gravitational field onto the transverse plane together with its whole non-linear action. On the way we touch upon the relation with the eikonal approximation, some evidence for censorship of quantum gravity, and an algebraic ring structure on 2d Minkowski spacetime.
description: 29 pages, 2 figures. v4: Duration of interaction is determined in Sec 4 and detailed in App C. Version accepted for publication in JHEP
Four boosted tops from a Regge gluon
Creators: name: Perelstein, Maxim
name: Spray, Andrew
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The hierarchy problem can by addressed by extending the four-dimensional space-time to include an extra compact spatial dimension with non-trivial "warped" metric, as first suggested by Randall and Sundrum. If the Randall-Sundrum framework is realized in string theory, and if the Standard Model particles propagate in the extra dimension, Regge excitations of the Standard Model states should appear around the TeV scale. In a previous publication, we proposed a field-theoretic framework to model the tensor (spin-2) Regge partner of the gluon. Here, we use this framework to study the collider phenomenology of this particle. We find that Regge gluon decays involving Kaluza-Klein (KK) partners of Standard Model fields are very important. In particular, the decay to two KK gluons (with one possibly off-shell) dominates in most of the parameter space. This decay produces a very distinctive experimental signature: four highly boosted top quarks. We present a preliminary study of the detection prospects for this signal at the Large Hadron Collider (LHC). We find that Regge gluons masses up to about 2 TeV can be probed with 10 inverse femtobarns of data at 7 TeV center-of-mass energy. With design luminosity at 14 TeV, the LHC should be sensitive to Regge gluon masses up to at least 3.5 TeV.
description: 24 pages, 10 figures. Published version: new section 5
Overcoming Gamma Ray Constraints with Annihilating Dark Matter in Milky Way Subhalos
Creators: name: Vincent, Aaron C
name: Xue, Wei
name: Cline, James M
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We reconsider Sommerfeld-enhanced annihilation of dark matter (DM) into leptons to explain PAMELA and Fermi electron and positron observations, in light of possible new effects from substructure. There is strong tension between getting a large enough lepton signal while respecting constraints on the fluxes of associated gamma rays. We first show that these constraints become significantly more stringent than in previous studies when the contributions from background e^+ e^- are taken into account, so much so that even cored DM density profiles are ruled out. We then show how DM annihilations within subhalos can get around these constraints. Specifically, if most of the observed lepton excess comes from annihilations in a nearby (within 1 kpc) subhalo along a line of sight toward the galactic center, it is possible to match both the lepton and gamma ray observations. We demonstrate that this can be achieved in a simple class of particle physics models in which the DM annihilates via a hidden leptophilic U(1) vector boson, with explicitly computed Sommerfeld enhancement factors. Gamma ray constraints on the main halo annihilations (and CMB constraints from the era of decoupling) require the annihilating component of the DM to be subdominant, of order 10^-2 of the total DM density.
description: Matches Published version. Added discussion of dipole anisotropy and extragalactic constraints. 17 pages, 17 figures, RevTeX
Boy Receiving Diploma, 1957
Creators: name: Kelsey, Carleton
name: Amagansett Historical Association
Publisher: name: Unknown
Year: 1957
Subjects: Photographs
Boys
Children
Graduation ceremonies
Diplomas
Men

description: This image shows a young boy in a suit jacket and glasses shaking hands with a man and receiving a diploma. This is the Amagansett Grade School Graduation Ceremony of 1957. This photograph was either taken or collected by Amagansett historian and librarian Carleton Kelsey.
description: This photograph is part of the collection of the Carleton Kelsey Collection of the Amagansett Historical Association. Kelsey was a local historian and librarian who collected photographs from others to add to the many photographs he took of the community himself.
Probing Neutrino Oscillations in Supersymmetric Models at the Large Hadron Collider
Creators: name: De Campos, F.
name: Eboli, O. J. P.
name: Hirsch, M.
name: Magro, M. B.
name: Porod, W.
name: Restrepo, D.
name: Valle, J. W. F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The lightest supersymmetric particle may decay with branching ratios that correlate with neutrino oscillation parameters. In this case the CERN Large Hadron Collider (LHC) has the potential to probe the atmospheric neutrino mixing angle with sensitivity competitive to its low-energy determination by underground experiments. Under realistic detection assumptions, we identify the necessary conditions for the experiments at CERN's LHC to probe the simplest scenario for neutrino masses induced by minimal supergravity with bilinear R parity violation.
description: 11 pages, 6 figures. To appear in Physical Review D
Domain Walls in AdS-Einstein-scalar Gravity
Creators: name: Yun, Sangheon
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note, we will show that the supergravity theory which is dual to ABJM field theory can be consistently reduced to scalar-coupled AdS-Einstein gravity and then consider the reflection symmetric domain wall and its small fluctuation. This domain wall solution is none other than dimensional reduction of M2-brane configuration.
description: 14 pages, v2: minor changes
Optical theorem for Aharonov-Bohm scattering
Creators: name: Sitenko, Yu. A.
name: Vlasii, N. D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Quantum-mechanical scattering off a magnetic vortex is considered, and the optical theorem is derived. The vortex core is assumed to be impermeable to scattered particles, and its transverse size is taken into account. We show that the scattering Aharonov-Bohm effect is independent of the choice of boundary conditions from the variety of the Robin ones. The behaviour of the scattering amplitude in the forward direction is analyzed, and the persistence of the Fraunhofer diffraction in the short-wavelength limit is shown to be crucial for maintaining the optical theorem in the quasiclassical limit.
description: 22 pages
Generalization in quantum machine learning from few training data
Creators: name: Caro, Matthias C.
name: Huang, Hsin-Yuan
name: Cerezo, M.
name: Sharma, Kunal
name: Sornborger, Andrew
name: Cincio, Lukasz
name: Coles, Patrick J.
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: quantum machine learning
subject: quantum circuits
subject: 500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik

description: Modern quantum machine learning (QML) methods involve variationally optimizing a parameterized quantum circuit on a training data set, and subsequently making predictions on a testing data set (i.e., generalizing). In this work, we provide a comprehensive study of generalization performance in QML after training on a limited number N of training data points. We show that the generalization error of a quantum machine learning model with T trainable gates scales at worst as T/N−−−−√. When only K ≪ T gates have undergone substantial change in the optimization process, we prove that the generalization error improves to K/N−−−−√. Our results imply that the compiling of unitaries into a polynomial number of native gates, a crucial application for the quantum computing industry that typically uses exponential-size training data, can be sped up significantly. We also show that classification of quantum states across a phase transition with a quantum convolutional neural network requires only a very small training data set. Other potential applications include learning quantum error correcting codes or quantum dynamical simulation. Our work injects new hope into the field of QML, as good generalization is guaranteed from few training data.
Worldsheet operator product expansions and p-point functions in AdS3/CFT2
Creators: name: Kirsch, Ingo
name: Wirtz, Tim
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct the operator product expansions (OPE) of the chiral primary operators in the worldsheet theory for strings on AdS_3 x S^3 x T^4. As an interesting application, we will use the worldsheet OPEs to derive a recursion relation for a particular class of extremal p-point correlators on the sphere. We compare our result with the corresponding recursion relation previously found in the symmetric orbifold theory on the boundary of AdS_3.
description: 21 pages, discussion on poles added in section 3, minor corrections
Different types of integrability and their relation to decoherence in central spin models
Creators: name: Erbe, B.
name: Schliemann, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the relation between integrability and decoherence in central spin models with more than one central spin. We show that there is a transition between integrability ensured by the Bethe ansatz and integrability ensured by complete sets of commuting operators. This has a significant impact on the decoherence properties of the system, suggesting that it is not necessarily integrability or nonintegrability which is related to decoherence, but rather its type or a change from integrability to nonintegrability.
description: 4 pages, 3 figures
Collective modes of monolayer, bilayer, and multilayer fermionic dipolar liquid
Creators: name: Li, Qiuzi
name: Hwang, E. H.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Motivated by recent experimental advances in creating polar molecular gases in the laboratory, we theoretically investigate the many body effects of two-dimensional dipolar systems with the anisotropic and $1/r^3$ dipole-dipole interactions. We calculate collective modes of 2D dipolar systems, and also consider spatially separated bilayer and multilayer superlattice dipolar systems. We obtain the characteristic features of collective modes in quantum dipolar gases. We quantitatively compare the modes of these dipolar systems with the modes of the extensively studied usual two-dimensional electron systems, where the inter-particle interaction is Coulombic.
description: 11 pages, 7 figures
Reconstruction of supernova ν_μ, ν_τ, anti-ν_μ, and anti-ν_τ neutrino spectra at scintillator detectors
Creators: name: Dasgupta, Basudeb
name: Beacom, John F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a new technique to directly reconstruct the spectra of mu/tau neutrinos and antineutrinos from a supernova, using neutrino-proton elastic scattering events (nu+p to nu+p) at scintillator detectors. These neutrinos, unlike electron neutrinos and antineutrinos, have only neutral current interactions, which makes it very challenging, with any reaction, to detect them and measure their energies. With updated inputs from theory and experiments, we show that this channel provides a robust and sensitive measure of their spectra. Given the low yields and lack of spectral information in other neutral current channels, this is perhaps the only realistic way to extract such information. This will be indispensable for understanding flavor oscillations of SN neutrinos, as it is likely to be impossible to disentangle neutrino mixing from astrophysical uncertainties in a SN without adequate spectral coverage of all flavors. We emphasize that scintillator detectors, e.g., Borexino, KamLAND, and SNO+, have the capability to observe these events, but they must be adequately prepared with a trigger for a burst of low-energy events. We also highlight the capabilities of a larger detector like LENA.
description: v3: Typo corrected in Eq.14, and metadata edits. Matches PRD version. 14 pages, 9 figures, 1 table
Assistive Robots for Patients With Amyotrophic Lateral Sclerosis: Exploratory Task-Based Evaluation Study With an Early-Stage Demonstrator
Creators: name: Klebbe, Robert
name: Scherzinger, Stefan
name: Eicher, Cornelia
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: amyotrophic lateral sclerosis
subject: activity of daily living
subject: human robot interaction
subject: assistive technology
subject: assistive robotics
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: Although robotic manipulators have great potential in promoting motor independence of people with motor impairments, only few systems are currently commercially available. In addition to technical, economic, and normative barriers, a key challenge for their distribution is the current lack of evidence regarding their usefulness, acceptance, and user-specific requirements. Objective: Against this background, a semiautonomous robot system was developed in the research and development project, robot-assisted services for individual and resource-oriented intensive and palliative care of people with amyotrophic lateral sclerosis (ROBINA), to support people with amyotrophic lateral sclerosis (ALS) in various everyday activities. Methods: The developed early-stage demonstrator was evaluated in a task-based laboratory study of 11 patients with ALS. On the basis of a multimethod design consisting of standardized questionnaires, open-ended questions, and observation protocols, participants were asked about its relevance to everyday life, usability, and design requirements. Results: Most participants considered the system to provide relevant support within the test scenarios and for their everyday life. On the basis of the System Usability Scale, the overall usability of the robot-assisted services for individual and resource-oriented intensive and palliative care of people with ALS system was rated as excellent, with a median of 90 (IQR 75-95) points. Moreover, 3 central areas of requirements for the development of semiautonomous robotic manipulators were identified and discussed: requirements for semiautonomous human-robot collaboration, requirements for user interfaces, and requirements for the adaptation of robotic capabilities regarding everyday life. Conclusions: Robotic manipulators can contribute to increase the autonomy of people with ALS. A key issue for future studies is how the existing ability level and the required robotic capabilities can be balanced to ensure both high user satisfaction and effective and efficient task performance.
Relativistic Bohmian trajectories of photons via weak measurements
Creators: name: Foo, Joshua
name: Asmodelle, Estelle
name: Lund, Austin P.
name: Ralph, Timothy C.
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Bohmian mechanics
subject: Relativistic Bohmian trajectories
subject: Michelson-Sagnac interferometer
subject: Photons
subject: 500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik

description: Bohmian mechanics is a nonlocal hidden-variable interpretation of quantum theory which predicts that particles follow deterministic trajectories in spacetime. Historically, the study of Bohmian trajectories has mainly been restricted to nonrelativistic regimes due to the widely held belief that the theory is incompatible with special relativity. Here, we present an approach for constructing the relativistic Bohmian-type velocity field of single particles. The advantage of our proposal is that it is operational in nature, grounded in weak measurements of the particle’s momentum and energy. We apply our weak measurement formalism to obtain the relativistic spacetime trajectories of photons in a Michelson–Sagnac interferometer. The trajectories satisfy quantum-mechanical continuity and the relativistic velocity addition rule. We propose a modified Alcubierre metric which could give rise to these trajectories within the paradigm of general relativity.
Sneutrino-antisneutrino oscillation at the Tevatron
Creators: name: Ghosh, Dilip Kumar
name: Honkavaara, Tuomas
name: Huitu, Katri
name: Roy, Sourov
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Sneutrino-antisneutrino oscillation can be a very useful probe to look for signatures of lepton number violation ($ΔL=2$) at the Tevatron. Here, we discuss a scenario where the total decay width of the sneutrino is very small, producing interesting signals at the Tevatron for a mass splitting $Δm$ as small as $10^{-14}$ GeV between the sneutrino mass eigenstates.
description: 7 pages, 3 eps figures, REVTeX4; v2: mathces the PRD version
Impact of Meditation–Based Lifestyle Modification on HRV in Outpatients With Mild to Moderate Depression: An Exploratory Study
Creators: name: Bringmann, Holger C.
name: Bogdanski, Martin
name: Seifert, Georg
name: Voss, Andreas
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: yoga
subject: meditation
subject: ethics
subject: mantra
subject: Lifestyle Modification
subject: HRV
subject: depression
subject: psychiatry
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: The scientific evaluation of mind-body-interventions (MBI), including yoga and meditation, has increased significantly in recent decades. However, evidence of MBI's efficacy on biological parameters is still insufficient. Objectives: In this study, we used HRV analysis to evaluate a novel MBI as a treatment of outpatients with mild to moderate depressive disorder. The Meditation-Based Lifestyle Modification (MBLM) program incorporates all major elements of classical yoga, including ethical principles of yoga philosophy, breathing exercises, postural yoga, and meditation. Methods: In this exploratory randomized controlled trial, we compared the changes in HRV indices of a MBLM group (N = 22) and a minimal treatment group (MINIMAL, drugs only, N = 17) with those of a multimodal treatment-as-usual group (TAU, according to best clinical practice, N = 22). Electrocardiogram (ECG) recordings were derived from a Holter monitoring device, and HRV indices have been extracted from nearly stationary 20-min periods. Results: Short-term HRV analysis revealed statistically significant differences in the pre-to-post changes between MBLM and TAU. In particular, the vagal tone mediating RMSSD and the Renyi entropy of symbolic dynamics indicated HRV gains in MBLM participants compared with TAU. Almost no alterations were observed in the MINIMAL group. Conclusions: Our results suggest a benefit in selected HRV parameters for outpatients with mild to moderate depression participating in the MBLM program. For further investigations, we propose analysis of complete 24-h HRV recordings and additional continuous pulse wave or blood pressure analysis to assess long-term modulations and cardiovascular effects.
Competing orders in the generalized Hund chain model at half-filling
Creators: name: Nonne, H.
name: Boulat, E.
name: Capponi, S.
name: Lecheminant, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By using a combination of several non-perturbative techniques -- a one-dimensional field theoretical approach together with numerical simulations using density matrix renormalization group -- we present an extensive study of the phase diagram of the generalized Hund model at half-filling. This model encloses the physics of various strongly correlated one-dimensional systems, such as two-leg electronic ladders, ultracold degenerate fermionic gases carrying a large hyperfine spin 3/2, other cold gases like Ytterbium 171 or alkaline-earth condensates. A particular emphasis is laid on the possibility to enumerate and exhaust the eight possible Mott insulating phases by means of a duality approach. We exhibit a one-to-one correspondence between these phases and those of the two-leg Hubbard ladder with interchain hopping. Our results obtained from a weak coupling analysis are in remarkable quantitative agreement with our numerical results carried out at moderate coupling.
description: 26 pages, 14 figures