cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Steady heat conduction in general relativity
Creators: name: Kim, Hyeong-Chan
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the steady state of heat conduction in general relativity using a variational approach for two-fluid dynamics. We adopt coordinates based on the Landau-Lifschitz observer because it allows us to describe thermodynamics with heat, formulated in the Eckart decomposition, on a static geometry. Through our analysis, we demonstrate that the stability condition of a thermal equilibrium state arises from the fundamental principle that heat cannot propagate faster than the speed of light. We then formulate the equations governing steady-state heat conduction and introduce a binormal equilibrium condition that the Tolman temperature gradient holds for the directions orthogonal to the heat flow. As an example, we consider radial heat conductions in a spherically symmetric spacetime. We find that the total diffusion over a spherical surface satisfies a red-shifted form, $J(r) \sqrt{-g_{tt}} =$ constant. We also discuss the behavior of local temperature around an event horizon and specify the condition that the local temperature is finite there.
description: 16 pages, 1 figure, minor corrections, to appear in PTEP
Correlations of decay times of entangled composite unstable systems
Creators: name: Durt, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The role played by Time in the quantum theory is still mysterious by many aspects. In particular it is not clear today whether the distribution of decay times of unstable particles could be described by a Time Operator. As we shall discuss, different approaches to this problem (one could say interpretations) can be found in the literature on the subject. As we shall show, it is possible to conceive crucial experiments aimed at distinguishing the different approaches, by measuring with accuracy the statistical distribution of decay times of entangled particles. Such experiments can be realized in principle with entangled kaon pairs.
0190 Māori and Portraiture
Creators: name: Blackley, Roger
Publisher: name: RIHA Journal
Year: 2018

description: Gottfried Lindauer’s Māori portraiture offers a distinctive example of a bicultural artistic practice in nineteenth-century New Zealand, one serving both European and indigenous patronage to a degree that is unparalleled in other British settler societies. This essay places the example of Lindauer into a wider context of Māori enthusiasm for and engagement with the genre of portraiture, ranging from the voyaging artists of the precolonial period to the emergence of the ‘ethnological’ portrait in the later nineteenth century. In charting the evolving relationships between subjects, artists, photographers and collectors, what do we learn about Māori attitudes to portraiture?
description: RIHA Journal, 2018: Special Issue "Gottfried Lindauer – Painting New Zealand"
Crack tip kinematics reveal the cohesive zone structure in brittle hydrogel fracture
Creators: name: Li, Chenzhuo
name: Wei, Xinyue
name: Wang, Meng
name: Adda-Bedia, Mokhtar
name: Kolinski, John M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: When brittle hydrogels fail, several mechanisms conspire to alter the state of stress near the tip of a crack, and it is challenging to identify which mechanism is dominant. In the fracture of brittle solids, a sufficient far-field stress results in the complete loss of structural strength as the material `unzips' at the tip of a crack, where stresses are concentrated. Direct studies of the so-called small-scale yielding zone, where deformation is large, are sparing. Using hydrogels as a model brittle solid, we probe the small-scale yielding region with a combination of microscopy methods that resolve the kinematics of the deformation. A zone over which most of the energy is dissipated through the loss of cohesion is identified in the immediate surroundings of the crack tip. With direct measurements, we determine the scale and structure of this zone, and identify how the specific loss mechanisms in this hydrogel material might generalize for brittle material failure.
description: 29 pages, 9 figures
The classical skeleton of open quantum chaotic maps
Creators: name: Raviola, Lisandro A.
name: Rivas, Alejandro M. F.
name: Carlo, Gabriel G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied two complementary decoherence measures purity and fidelity for a generic diffusive noise in two different chaotic systems (the baker and the cat maps). For both quantities, we have found classical structures in quantum mechanics - the scar functions - that are specially stable when subjected to environmental perturbations. We show that these quantum states constructed on classical invariants are the most robust significant quantum distributions in generic dissipative maps.
description: 10 pages, 6 figures, accepted in Physica D
Effect of the N3LO three-nucleon contact interaction on p-d scattering observables
Creators: name: Girlanda, L.
name: Filandri, E.
name: Kievsky, A.
name: Marcucci, L. E.
name: Viviani, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A unitary transformation allows to remove redundant terms in the two-nucleon (2N) contact interaction at the fourth order (N3LO) in the low-energy expansion of Chiral Effective Field Theory. In so doing a three-nucleon (3N) interaction is generated. We express its short-range component in terms of five combinations of low-energy constants (LECs) parametrizing the N3LO 2N contact Lagrangian. Within a hybrid approach, in which this interaction is considered in conjunction with the phenomenological AV18 2N potential, we show that the involved LECs can be used to fit very accurate data on polarization observables of low-energy $p-d$ scattering, in particular the $A_y$ asymmetry. The resulting interaction is of the right order of magnitude for a N3LO contribution.
description: 9 pages, 2 figures
Bose-Einstein condensation of paraxial light
Creators: name: Klaers, J.
name: Schmitt, J.
name: Damm, T.
name: Vewinger, F.
name: Weitz, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Photons, due to the virtually vanishing photon-photon interaction, constitute to very good approximation an ideal Bose gas, but owing to the vanishing chemical potential a (free) photon gas does not show Bose-Einstein condensation. However, this is not necessarily true for a lower-dimensional photon gas. By means of a fluorescence induced thermalization process in an optical microcavity one can achieve a thermal photon gas with freely adjustable chemical potential. Experimentally, we have observed thermalization and subsequently Bose-Einstein condensation of the photon gas at room temperature. In this paper, we give a detailed description of the experiment, which is based on a dye-filled optical microcavity, acting as a white-wall box for photons. Thermalization is achieved in a photon number-conserving way by photon scattering off the dye molecules, and the cavity mirrors both provide an effective photon mass and a confining potential - key prerequisites for the Bose-Einstein condensation of photons. The experimental results are in good agreement with both a statistical and a simple rate equation model, describing the properties of the thermalized photon gas.
description: Experiment Review, 17 pages with 15 figures
Coarse-grained molecular dynamics simulations of DNA representing bases as ellipsoids
Creators: name: Morriss-Andrews, Herbert Alexander
Publisher: name: University of British Columbia
Year: 2009

description: We conducted a study of various physical and geometric properties of single and double stranded DNA by developing a coarse-grained computational model. To represent the steric shapes of the bases more accurately, we modelled their interactions using the ellipsoidal RE² potential [18]. The bond, angle and dihedral potentials describing the DNA backbone are parametrized using statistics we gathered from atomistic simulations, and the RE² interaction parameters were likewise obtained from all-atom data. We find reasonable agreement of the dependence of the persistence length on ionic concentration with polymer theory [44]. We also observed the collapse of single stranded DNA by checking the radius of gyration as we lowered the temperature. Our simulations show a very strong dependence of helical twist and stacking interactions on the strength of the RE² potential, although increasing the twist frustrates all other potentials. The dependence of twist and stacking on ionic concentration and temperature was also analyzed. Our DNA also exhibits the correct right-handed chirality, with the chiral symmetry broken by the dihedral potentials. The model also gives clear major and minor grooves. Our methodical approach to the parametrization and analysis provides insight into the effect of the parameters in a coarse-grained model on the properties observed in the simulated DNA.
Spectroscopic analysis of Milky Way outer halo satellites: Aquarius II and Bootes II
Creators: name: Bruce, Jordan
name: Li, Ting S.
name: Pace, Andrew B.
name: Heiger, Mairead
name: Song, Ying-Yi
name: Simon, Joshua D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this paper we present a chemical and kinematic analysis of two ultra-faint dwarf galaxies (UFDs), Aquarius II (Aqu~II) and \text{Boötes II} (Boo~II), using Magellan/IMACS spectroscopy. We present the largest sample of member stars for Boo~II (12), and the largest sample of red-giant-branch members with metallicity measurements for Aqu~II (8). In both UFDs, over 80\% of targets selected based on $Gaia$ proper motions turned out to be spectroscopic members. In order to maximize the accuracy of stellar kinematic measurements, we remove the identified binary stars and RR Lyrae variables. For Aqu~II we measure a systemic velocity of $-65.3 \pm 1.8$ km s$^{-1}$ and a metallicity of [Fe/H] = $-2.57^{+0.17}_{-0.17}$. When compared with previous measurements, these values display a $\sim 6$ km s$^{-1}$ difference in radial velocity and a decrease of 0.27 dex in metallicity. Similarly for Boo~II, we measure a systemic velocity of $-130.4^{+1.4}_{-1.1}$ km s$^{-1}$, more than 10 km s$^{-1}$ different from the literature, a metallicity almost 1 dex smaller at [Fe/H] = $-2.71^{+0.11}_{-0.10}$, and a velocity dispersion 3 times smaller at $σ_{v_{\rm hel}} = 2.9^{+1.6}_{-1.2}$ km s$^{-1}$. Additionally, we derive systemic proper motion parameters and model the orbits of both UFDs. Finally, we highlight the extremely dark matter dominated nature of Aqu~II and compute the J-factor for both galaxies to aid searches of dark matter annihilation. Despite the small size and close proximity of Boo~II, it is an intermediate target for the indirect detection of dark matter annihilation due to its low velocity dispersion and corresponding low dark matter density.
description: 21 pages, 7 figures, 5 tables. Submitted to AAS Journal
Sulfur depletion in dense clouds and circumstellar regions I. H2S ice abundance and UV-photochemical reactions in the H2O-matrix
Creators: name: Jiménez-Escobar, A.
name: Caro, G. M. Muñoz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: This work aims to study the unexplained sulfur depletion observed toward dense clouds and protostars. We made simulation experiments of the UV-photoprocessing and sublimation of H2S and H2S:H2O ice in dense clouds and circumstellar regions, using the Interstellar Astrochemistry Chamber (ISAC), a state-of-the-art ultra-high-vacuum setup. The ice was monitored in situ by mid-infrared spectroscopy in transmittance. Temperature-programmed desorption (TPD) of the ice was performed using a quadrupole mass spectrometer (QMS) to detect the volatiles desorbing from the ice. Comparing our laboratory data to infrared observations of protostars we obtained a more accurate upper limit of the abundance of H2S ice toward these objects. We determined the desorption temperature of H2S ice, which depends on the initial H2S:H2O ratio. UV-photoprocessing of H2S:H2O ice led to the formation of several species. Among them, H2S2 was found to photodissociate forming S2 and, by elongation, other species up to S8, which are refractory at room temperature. A large fraction of the missing sulfur in dense clouds and circumstellar regions could thus be polymeric sulfur residing in dust grains.
description: 11 pages, 19 figures
Quantitative methods for deconvolution of true topographical properties of object on the basis of measured AFM-images: Part 2. Broadening effect
Creators: name: Gallyamov, M. O.
name: Yaminsky, I. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Technique of the quantitative description of image broadening effect in AFM allowing to restore real geometrical parameters of object using two-parameters model (height and width at half-height) is developed. Application of the technique has allowed to receive the quantitative information about molecular structure of DNA-surfactant complexes.
description: in Russian
Neutral kaon interferometry at KLOE and KLOE-2
Creators: name: Balwierz, I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Neutral kaons produced in correlated pairs at a phi-factory offer unique possibilities to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. The analysis of the data collected by the KLOE experiment at DAFNE is still ongoing with the aim of improving previous results and limits on several parameters describing CPT violation and decoherence. Ancillary measurements like the regeneration cross section on the beam pipe materials are also in progress and will be very useful to reduce the systematic uncertainties. Prospects on improvements at the KLOE-2 experiment, aiming at an increase of the integrated luminosity of about a factor of ten with an upgraded detector, will be also discussed.
description: 8 pages, 6 figures
p-Adic Statistical Field Theory and Convolutional Deep Boltzmann Machines
Creators: name: Zúñiga-Galindo, W. A.
name: He, Cuiyu
name: Zambrano-Luna, B. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Understanding how deep learning architectures work is a central scientific problem. Recently, a correspondence between neural networks (NNs) and Euclidean quantum field theories (QFTs) has been proposed. This work investigates this correspondence in the framework of p-adic statistical field theories (SFTs) and neural networks (NNs). In this case, the fields are real-valued functions defined on an infinite regular rooted tree with valence p, a fixed prime number. This infinite tree provides the topology for a continuous deep Boltzmann machine (DBM), which is identified with a statistical field theory (SFT) on this infinite tree. In the p-adic framework, there is a natural method to discretize SFTs. Each discrete SFT corresponds to a Boltzmann machine (BM) with a tree-like topology. This method allows us to recover the standard DBMs and gives new convolutional DBMs. The new networks use O(N) parameters while the classical ones use O(N^{2}) parameters.
0197 "The native inhabitants, although cannibals, were a fine and warlike race" – On the Popular Image of New Zealand in Nineteenth-Century Europe
Creators: name: Oesterreich, Miriam
Publisher: name: RIHA Journal
Year: 2018

description: The New Zealand to be discovered in the popular media of nineteenth-century Europe is surprising: foremost because it is scarcely present. Other British colonies like those in North America and Australia were much-loved subjects for popular exotic pictorial inventions, for example in illustrations to Karl May novels, product advertising, posters for world exhibitions and the so-called ethnological expositions, or successful journals like Die Gartenlaube in Germany. Images of the islands and their inhabitants are noticeable by their absence in product advertising in Europe. Likewise Maori appear to have not featured at the ethnological expositions, though they do appear considerably in scientific and scholarly publications. Hence, the essay makes the case that in this context high and popular culture are frequently not clearly distinct from one another in the nineteenth century: the scientific and scholarly literature served an extremely broad circle of interested persons in a bourgeoisie hungry for knowledge. The oil paintings of the academic Gottfried Lindauer, for example, were shown at the Colonial and Indian Exhibition of 1886 in London side by side with ethnographic artefacts and a recreated Māori habitat in the New Zealand Court. Thus, the overall image of the islands conveyed in the Exhibition matched the contemporary taste of indulging in excessive impressions at such expositions. Textual descriptions and interpretations of what was seen also heavily featured in the press, while a few successful novels painted a picture of the typical ‘New Zealander’. The picture Europe had got of the British colony New Zealand in the nineteenth century was richly faceted, albeit not particularly differentiated. The essay aims to describe these various facets and, moreover, identify how they depended on their popularity in the different media.
description: RIHA Journal, 2018: Special Issue "Gottfried Lindauer – Painting New Zealand"
Photon-photon scattering in collisions of laser pulses
Creators: name: King, B.
name: Keitel, C. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A scenario for measuring the predicted processes of vacuum elastic and inelastic photon-photon scattering with modern lasers is investigated. Numbers of measurable scattered photons are calculated for the collision of two, Gaussian-focused, pulsed lasers. We show that a single 10PW optical laser beam split into two counter-propagating pulses is sufficient for measuring the elastic process. Moreover, when these pulses are sub-cycle, our results suggest the inelastic process should be measurable too.
description: 23 pages, 15 figures
Trends and patterns of scintillator nonproportionality
Creators: name: Khodyuk, Ivan V.
name: Dorenbos, Pieter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Data on the photon nonproportional response of 33 inorganic scintillation materials are systemized and analyzed. The main trends of nonproportionality for different groups of inorganic scintillators, especially for oxides and halides, are highlighted. The dependence of the shape and degree of photon nonproportional response versus chemical composition, dopant type, refractive index and other fundamental properties of the materials is studied. Better proportionality appears to be correlated with higher refractive index of the compound. Another related factor is the width of the valence band in halide compounds. With larger valence band width from fluorides, to chlorides, to bromides, and to iodides, a better proportionality is observed.
description: 13 pages, 18 figures, 2 tables. Submitted to IEEE Transactions on Nuclear Science
Probing the Higgs trilinear self-coupling through Higgs+jet production
Creators: name: Gao, Jun
name: Shen, Xiao-Min
name: Wang, Guoxing
name: Yang, Li Lin
name: Zhou, Bin
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the calculation of the next-to-leading order (NLO) electroweak (EW) corrections proportional to the Higgs trilinear self-coupling ($λ_{HHH}$) for Higgs boson plus one jet production at the Large Hadron Collider (LHC). We use the method of large top quark mass expansion to tackle the most challenging two-loop virtual amplitude, and apply the Padé approximation to extend the region of convergence of the expansion. We find that the NLO EW corrections is $0.66\%$ for the total cross section. For the invariant mass distribution and Higgs boson transverse momentum distribution, the NLO corrections are almost flat with their values similar in size. Our results can be used to set extra constraints on $λ_{HHH}$ at the LHC.
description: 9 pages, 5 figures, 2 tables
Sans fin sans (endlessness): for guitar, seven wind instruments and double bass
Creators: name: Amort, Joseph Scott
Publisher: name: University of British Columbia
Year: 2009

description: sans fin sans (endlessness) is a fifteen-minute musical composition scored for solo guitar, seven wind instruments (flute, oboe, clarinet, bassoon, trumpet, horn, trombone) and double bass. Although the work is in one continuous movement, it consists of seven distinct sections, each constructed from fragmented pieces of a precomposed originating structure. Influenced by the prose of Samuel Beckett, sans fin sans is an exploration of non-linear time and the Deleuzian notion of art as abstract machine.
"Commutator formalism" for pairs correlated through Schmidt decomposition as used in Quantum Information
Creators: name: Combescot, Monique
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: To easily calculate statistical properties of pairs correlated through Schmidt decomposition, as commonly used in Quantum Information, we propose a "commutator formalism" for these single-index pairs, somewhat simpler than the one we developed for double-index Wannier excitons. We use it here to get the pair number threshold for bosonic behavior of $N$ pairs through the requirement that their number operator mean value must stay close to $N$. While the main term of this mean value is controlled by the second moment of the Schmidt distribution, so that to increase this threshold, we must increase the Schmidt number, higher momenta appearing at higher orders lead to choosing a distribution as flat as possible.
Bootstrap bounds on D0-brane quantum mechanics
Creators: name: Lin, Henry W.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive simple bootstrap bounds on correlation functions of the BFSS matrix theory/D0-brane quantum mechanics. The result strengthens and extends Polchinski's virial theorem bound to finite energies and gives the first non-trivial bound on $\langle{\text{Tr}\, X^2\rangle}$. Despite their simplicity, the bounds hint at some features of the dual black hole geometry. Our best lower bounds are already a factor of $\sim 2$ from existing Monte Carlo results.
description: 9 pages, 3 figures + Appendices, v2: fixed typos and factors of 2's, new bound presented in Figure 3, added Appendix D
Theodoros G. Giannopoulos, Die letzte Elite der mykenischen Welt. Achaia in mykenischer Zeit und das Phänomen der Kriegerbestattungen im 12.-11. Jahrhundert v. Chr.
Creators: name: Kilian-Dirlmeier, Imma
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2020

description: Rezension zu: Theodoros G. Giannopoulos, Die letzte Elite der mykenischen Welt. Achaia in mykenischer Zeit und das Phänomen der Kriegerbestattungen im 12.-11. Jahrhundert v. Chr. Universitätsforschungen zur Prähistorischen Archäologie Band 152. Verlag Dr. Rudolf Habelt, Bonn 2008. ISBN 978-3-7749-3535-8. 288 Seiten mit 33 Abbildungen, drei Tabellen und 79 Tafeln.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 88 2010(2013)
Designer quantum states on a fractal substrate: compact localization, flat bands and the edge modes
Creators: name: Biswas, Sougata
name: Chakrabarti, Arunava
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Compact localized single particle eigenstates on a deterministic fractal substrate, modelled by a triangular Sierpinski gasket of arbitrarily large size, are unravelled and examined analytically. We prescribe an exact real space renormalization group (RSRG) decimation scheme within a tight binding formalism to discern these states, and argue that the number of such states can be infinite if the fractal substrate is enlarged to its thermodynamic limit. Interestingly, these localized states turn out to populate the non-dispersive, flat bands in a periodic array of Sierpinski gasket motifs, however large they may be. Our results match and corroborate the recently observed compact localized, flat band states engineered on two dimensional photonic waveguide networks with a fractal geometry, and provide a whole subset of them, which, in principle, should be observable in fractal photonic lattice experiments.
B. S. Heeb: Das Bodenseerheintal als Siedlungsraum und Verkehrsweg in prähistorischen Epochen. Eine siedlungsarchäologische Untersuchung
Creators: name: Behnke, Hans Joachim
Publisher: name: Jahresschrift für mitteldeutsche Vorgeschichte
Year: 2020

description: Rezension zu: B. S. Heeb: Das Bodenseerheintal als Siedlungsraum und Verkehrsweg in prähistorischen Epochen. Eine siedlungsarchäologische Untersuchung. Frankfurter Archäologische Schriften 20. Verlag Dr. Rudolf Habelt GmbH, Bonn 2012. 393 Seiten, 151 Abbildungen, 93 Tafeln und 6 Karten
description: Jahresschrift für mitteldeutsche Vorgeschichte, Bd. 96 (2017): Jahresschrift für Mitteldeutsche Vorgeschichte
Differential Equations with Fractional Derivative and Universal Map with Memory
Creators: name: Tarasov, Vasily E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Discrete maps with long-term memory are obtained from nonlinear differential equations with Riemann-Liouville and Caputo fractional derivatives. These maps are generalizations of the well-known universal map. The memory means that their present state is determined by all past states with special forms of weights. To obtain discrete map from fractional differential equations, we use the equivalence of the Cauchy-type problems and to the nonlinear Volterra integral equations of second kind. General forms of the universal maps with memory, which take into account general initial conditions, for the cases of the Riemann-Liouville and Caputo fractional derivatives, are suggested.
description: 21 pages, LaTeX
The minimal length: a cut-off in disguise?
Creators: name: Bosso, Pasquale
name: Petruzziello, Luciano
name: Wagner, Fabian
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The minimal-length paradigm, a possible implication of quantum gravity at low energies, is commonly understood as a phenomenological modification of Heisenberg's uncertainty relation. We show that this modification is equivalent to a cut-off in the space conjugate to the position representation, i.e. the space of wave numbers, which does not necessarily correspond to momentum space. This result is generalized to several dimensions and noncommutative geometries once a suitable definition of the wave number is provided. Furthermore, we find a direct relation between the ensuing bound in wave-number space and the minimal-length scale. For scenarios in which the existence of the minimal length cannot be explicitly verified, the proposed framework can be used to clarify the situation. Indeed, applying it to common models, we find that one of them does, against all expectations, allow for arbitrary precision in position measurements. In closing, we comment on general implications of our findings for the field. In particular, we point out that the minimal length is purely kinematical such that, effectively, there is only one model of minimal-length quantum mechanics.
Debris disc candidates in systems with transiting planets
Creators: name: Krivov, Alexander V.
name: Reidemeister, Martin
name: Fiedler, Simone
name: Löhne, Torsten
name: Neuhäuser, Ralph
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Debris discs are known to exist around many planet-host stars, but no debris dust has been found so far in systems with transiting planets. Using publicly available catalogues, we searched for infrared excesses in such systems. In the recently published Wide-Field Infrared Survey Explorer (WISE) catalogue, we found 52 stars with transiting planets. Two systems with one transiting "hot Jupiter" each, TrES-2 and XO-5, exhibit small excesses both at 12 and 22 microns at a > 3 sigma level. Provided that one or both of these detections are real, the frequency of warm excesses in systems with transiting planets of 2-4 % is comparable to that around solar-type stars probed at similar wavelengths with Spitzer's MIPS and IRS instruments. Modelling suggests that the observed excesses would stem from dust rings with radii of several AU. The inferred amount of dust is close to the maximum expected theoretically from a collisional cascade in asteroid belt analogues. If confirmed, the presence of debris discs in systems with transiting planets may put important constraints onto formation and migration scenarios of hot Jupiters.
description: Accepted for publication in MNRAS Letters
Relativistic binary systems in scale-independent energy-momentum squared gravity
Creators: name: Akarsu, Ozgur
name: Nazari, Elham
name: Roshan, Mahmood
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we study the gravitational-wave (GW) radiation and radiative behavior of relativistic binary systems in the scale-independent energy-momentum squared gravity (EMSG). Using the post-Minkowskian gravity based on the Landau-Lifshitz formulation of the theory, the field equations of the scale-independent EMSG are solved approximately. The gravitational potential in the wave zone of a gravitational source is then obtained. Doing so, we derive the GW signals emitted from a binary system. The results are different from those obtained in general relativity (GR). It is shown that the relevant non-GR corrections modify the wave amplitude and leave the GW polarizations unchanged. In this case, the system loses energy to modified GWs. This leads to a change in the secular variation of the Keplerian parameters of the binary system. In this work, we investigate the non-GR effects on the radiative parameter, i.e., the first time derivative of the orbital period. Next, applying these results together with GW observations from the relativistic binary systems, we constrain/test the scale-independent EMSG theory in the strong-field regime. After assuming that GR is the valid gravity theory, as a priori expectation, we find that the free parameter of the theory is of the order $10^{-5}$ from the direct GW observation, the GW events GW190425 and GW170817, as well as the indirect GW observation, the double pulsar PSR J0737$-$3039A/B experiment.
description: 20 pages. V2: changes and references have been added. Accepted for publication in MNRAS
Creating Non-Maxwellian Velocity Distributions in Ultracold Plasmas
Creators: name: Castro, J.
name: Bannasch, G.
name: McQuillen, P.
name: Pohl, T.
name: Killian, T. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present techniques to perturb, measure and model the ion velocity distribution in an ultracold neutral plasma produced by photoionization of strontium atoms. By optical pumping with circularly polarized light we promote ions with certain velocities to a different spin ground state, and probe the resulting perturbed velocity distribution through laser-induced fluorescence spectroscopy. We discuss various approaches to extract the velocity distribution from our measured spectra, and assess their quality through comparisons with molecular dynamic simulations
description: 13 pages, 8 figures
Offene Fragen zum Futurismus
Creators: name: Zimmermann, Michael F.
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 41 Nr. 8 (1988): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Thomas French/David O’Connor, York Minster, A Catalogue of Medieval Stained Glass. Fascicule 1: The West Windows of the Nave w I, w II, n XXX, s XXXVI
Creators: name: Fritzsche, Gabriela
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Rezension zu: Thomas French/David O’Connor, York Minster, A Catalogue of Medieval Stained Glass. Fascicule 1: The West Windows of the Nave w I, w II, n XXX, s XXXVI (Corpus Vitrearum Medii Aevi Great Britain — Volume III). The British Academy (Oxford University Press, New York) 1987. XXII + 100 Seiten, 31 Tafeln, davon 16 in Farbe, 2 Microfiches. £ 29,50.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 41 Nr. 9 (1988): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Simulation study on the optical processes at deep-sea neutrino telescope sites
Creators: name: Hu, Fan
name: Wei, Zhenyu
name: Tian, Wei
name: Ye, Ziping
name: Zhang, Fuyudi
name: Sun, Zhengyang
name: Zhi, Wei
name: Chang, Qichao
name: Xue, Qiao
name: Li, Zhuo
name: Xu, Donglian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The performance of a large-scale water Cherenkov neutrino telescope relies heavily on the transparency of the surrounding water, quantified by its level of light absorption and scattering. A pathfinder experiment was carried out to measure the optical properties of deep seawater in South China Sea with light-emitting diodes (LEDs) as light sources, photon multiplier tubes (PMTs) and cameras as photon sensors. Here, we present an optical simulation program employing the Geant4 toolkit to understand the absorption and scattering processes in the deep seawater, which helps to extract the underlying optical properties from the experimental data. The simulation results are compared with the experimental data and show good agreements. We also verify the analysis methods that utilize various observables of the PMTs and the cameras with this simulation program, which can be easily adapted by other neutrino telescope pathfinder experiments and future large-scale detectors.
description: 27 pages, 11 figures
Sines, steps and droplets: Semiparametric Bayesian modeling of arrival time series
Creators: name: Loredo, Thomas J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: I describe ongoing work developing Bayesian methods for flexible modeling of arrival time series data without binning, aiming to improve detection and measurement of X-ray and gamma-ray pulsars, and of pulses in gamma-ray bursts. The methods use parametric and semiparametric Poisson point process models for the event rate, and by design have close connections to conventional frequentist methods currently used in time-domain astronomy.
description: 4 pages, 1 figure; to appear in the proceedings of IAU Symposium 285, "New Horizons in Time Domain Astronomy" (proceedings eds. Elizabeth Griffin, Bob Hanisch, and Rob Seaman), Cambridge University Press; see http://www.physics.ox.ac.uk/IAUS285/
0135 Barradas' Vibrationism and its Catalan Context
Creators: name: Faxedas Brujats, M. Lluïsa
Publisher: name: RIHA Journal
Year: 2016

description: Rafael Barradas' Vibrationism is often recognised, together with Planism and Ultraism, as one of the first avant-garde movements to emerge in Spain. However, little attention has been paid to its intellectual roots and its Catalan and European context. This paper will examine the birth of Vibrationism as the Uruguayan painter's response to his contact both with the European avant-garde, in particular Futurism and Simultaneism, and especially with the Catalan context in which it appeared. The brief story of the movement shows us how some of the more consistent answers to the pictorial issues raised by the European avant-garde of the 1910s were to be found in what has traditionally been understood as its periphery.
description: RIHA Journal, 2016: Special Issue "Southern Modernisms"
Ponderomotive force due to the intrinsic spin for electrostatic waves in a magnetized plasma
Creators: name: Al-Naseri, Haidar
name: Brodin, Gert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We study the contribution from the electron spin to the ponderomotive force, using a quantum kinetic model including the spin-orbit correction. Specifically, we derive an analytical expression for the ponderomotive force, applicable for electrostatic waves propagating parallel to an external magnetic field. To evaluate the expression, we focus on the case of Langmuir waves and on the case of the spin-resonance wave mode, where the classical and spin contributions to the ponderomotive force are compared. Somewhat surprisingly, dependent on the parameter regime, we find that the spin contribution to the ponderomotive force may dominate for the Langmuir wave, whereas the classical contribution can dominate for the spin resonance mode. Naturally, this does not prevent the opposite case from being the more common one.
Elastic neutrino-atom scattering as a probe of neutrino millicharge and magnetic moment
Creators: name: Donchenko, Georgy
name: Kouzakov, Konstantin
name: Studenikin, Alexander
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Neutrino scattering on atomic systems at low-energy transfer is a powerful tool for searching the neutrino electromagnetic interactions. The regime of coherent elastic neutrino-atom scattering, i.e., when the atom recoils as a pointlike particle, can be effectively fulfilled in the case of tritium antineutrinos. We present theoretical calculations for coherent elastic neutrino-atom scattering processes on such targets as the H, $^2$H, $^3$He, and $^4$He %, and $^{12}$C atoms. We show how the atomic effects and neutrino electromagnetic properties, namely the neutrino millicharge and magnetic moment, may manifest themselves in the atomic-recoil spectra. Our results can be used in planning the experiments on coherent elastic neutrino-atom scattering (in particular, with superfluid He-4).
description: 4 pages, based on the presentation at the 41st International Conference on High Energy Physics (ICHEP2022 6-13 July 2022, Bologna, Italy), prepared for the ICHEP2022 proceedings
Connectedness of planar self-affine sets associated with non-consecutive collinear digit sets
Creators: name: Leung, King-Shun
name: Luo, Jun Jason
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In the paper, we focus on the connectedness of planar self-affine sets $T(A,{\mathcal{D}})$ generated by an integer expanding matrix $A$ with $|\det (A)|=3$ and a collinear digit set ${\mathcal{D}}=\{0,1,b\}v$, where $b>1$ and $v\in {\mathbb{R}}^2$ such that $\{v, Av\}$ is linearly independent. We discuss the domain of the digit $b$ to determine the connectedness of $T(A,{\mathcal{D}})$. Especially, a complete characterization is obtained when we restrict $b$ to be an integer. Some results on the general case of $|\det (A)|> 3$ are obtained as well.
description: 15 pages, 10 figures
0147 L’art de la reprise dans la collection de Gaston de Saint-Maurice
Creators: name: Baillot, Elodie
Publisher: name: RIHA Journal
Year: 2017

description: By studying objects from the former collection of the French collector Gaston de Saint-Maurice (1831-1905) now in the Louvre and the Musée des Arts décoratifs in Paris, this article elucidates different aspects of the taste for reuse of architectural elements and decorative artefacts in the 19th century. Known for his collection of Islamic art (acquired by the South Kensington Museum in 1883), Saint-Maurice also collected European decorative arts showing his taste for historical decors. This article also raises the question of the appropriation of such artefacts by museums today.
description: RIHA Journal, 2017: RIHA Journal
Zur Geschichte des Flußbildes der Mosel bei Trier
Creators: name: Kentenich, Gottfried
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2020

description: Tafel VII: https://doi.org/10.11588/tz.1927.4.76519
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 2 Nr. 3 (1927): Trierer Zeitschrift : Vierteljahreshefte für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Der Dichter und Humanist Mathias Agricius von Wittlich (1545-1613) : Sein Leben, sein Werdegang und seine Werke
Creators: name: Keil, Leonhard
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2020

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 2 Nr. 3 (1927): Trierer Zeitschrift : Vierteljahreshefte für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
C. Casselmann: Spuren des Menschen. Erkennen von Strukturen archäologischer Fundstreuungen
Creators: name: Weber, Thomas
Publisher: name: Jahresschrift für mitteldeutsche Vorgeschichte
Year: 2020

description: Rezension zu: C. Casselmann: Spuren des Menschen. Erkennen von Strukturen archäologischer Fundstreuungen. Landschaftsarchäologische Untersuchungen im Becken von Phlious 1. Universitätsforschungen zur prähistorischen Archäologie 183. Verlag Dr. Rudolf Habelt GmbH, Bonn 2010. 305 Seiten, 149 Abbildungen, 42 Karten und 1 CD-ROM
description: Jahresschrift für mitteldeutsche Vorgeschichte, Bd. 96 (2017): Jahresschrift für Mitteldeutsche Vorgeschichte
Effective single mode methodology for strongly coupled multimode molecular-plasmon nanosystems
Creators: name: Romanelli, Marco
name: Riso, Rosario R.
name: Haugland, Tor S.
name: Ronca, Enrico
name: Corni, Stefano
name: Koch, Henrik
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Strong coupling between molecules and quantized fields has emerged as an effective methodology to engineer molecular properties. New hybrid states are formed when molecules interact with quantized fields. Since the properties of these states can be modulated by fine-tuning the field features, an exciting and new side of chemistry can be explored. In particular, significant modifications of the molecular properties can be achieved in plasmonic nanocavities, where the field quantization volume is reduced to sub-nanometric volumes. Intriguing applications of nanoplasmonics include the possibility of coupling the plasmons with a single molecule, instrumental for sensing, high-resolution spectroscopy, and single-molecule imaging. In this work, we focus on phenomena where the simultaneous effects of multiple plasmonic modes are critical. We propose a theoretical methodology to account for many plasmonic modes simultaneously while retaining computational feasibility. Our approach is conceptually simple and allows us to accurately account for the multimode effects and rationalize the nature of the interaction between multiple plasmonic excitations and molecules.
description: 27 pages, 6 figures
Astrometric Accelerations as Dynamical Beacons: A Giant Planet Imaged Inside the Debris Disk of the Young Star AF Lep
Creators: name: Franson, Kyle
name: Bowler, Brendan P.
name: Zhou, Yifan
name: Pearce, Tim D.
name: Gagliuffi, Daniella C. Bardalez
name: Biddle, Lauren
name: Brandt, Timothy D.
name: Crepp, Justin R.
name: Dupuy, Trent J.
name: Faherty, Jacqueline
name: Jensen-Clem, Rebecca
name: Morgan, Marvin
name: Sanghi, Aniket
name: Theissen, Christopher A.
name: Tran, Quang H.
name: Wolf, Trevor A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the direct imaging discovery of a giant planet orbiting the young star AF Lep, a 1.2 $M_{\odot}$ member of the 24 $\pm$ 3 Myr $β$ Pic moving group. AF Lep was observed as part of our ongoing high-contrast imaging program targeting stars with astrometric accelerations between Hipparcos and Gaia that indicate the presence of substellar companions. Keck/NIRC2 observations in $L'$ with the Vector Vortex Coronagraph reveal a point source, AF Lep b, at ${\approx}340$ mas which exhibits orbital motion at the 6-$σ$ level over the course of 13 months. A joint orbit fit yields precise constraints on the planet's dynamical mass of 3.2$^{+0.7}_{-0.6}$ $M_\mathrm{Jup}$, semi-major axis of $8.4^{+1.1}_{-1.3}$ au, and eccentricity of $0.24^{+0.27}_{-0.15}$. AF Lep hosts a debris disk located at $\sim$50 au, but it is unlikely to be sculpted by AF Lep b, implying there may be additional planets in the system at wider separations. The stellar inclination ($i_* = 54^{+11}_{-9} {}^\circ$) and orbital inclination ($i_o = 50^{+9}_{-12} {}^\circ$) are in good agreement, which is consistent with the system having spin-orbit alignment. AF Lep b is the lowest-mass imaged planet with a dynamical mass measurement and highlights the promise of using astrometric accelerations as a tool to find and characterize long-period planets.
description: 14 pages, 3 figures, accepted to ApJL
Adelic Geometry and Polarity
Creators: name: Thiel, Carsten
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11H06, 11R56, 52C07

description: In the present paper we generalise transference theorems from the classical geometry of numbers to the geometry of numbers over the ring of adeles of a number field. To this end we introduce a notion of polarity for adelic convex bodies.
description: 8 pages
Van Gogh a Paris
Creators: name: Barthelmess, Wieland
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 41 Nr. 10 (1988): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege