cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A quantitative explanation of the radio--X-ray correlation in black-hole X-ray binaries
Creators: name: Kylafis, Nikolaos D.
name: Reig, Pablo
name: Tsouros, Alexandros
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The observed correlation between the radio and X-ray fluxes in the hard state of black-hole X-ray binaries (BHXRBs) has been around for more than two decades. It is currently accepted that the hard X-rays in BHXRBs come from Comptonization in the corona and the radio emission from the relativistic jet (Lorentz $γ>> 1$), which is a narrow structure of a few $R_g=GM/c^2$ at its base. The relativistic jet and the corona, however, are separate entities with hardly any communication between them, apart from the fact that both are fed from the accreting matter. It is also widely accepted that the accretion flow around black holes in BHXRBs consists of an outer thin disk and an inner hot flow. From this hot inner flow, an outflow emanates in the hard and hard-intermediate states of the source. By considering Compton up-scattering of soft disk photons in the outflow (i.e., in the outflowing corona, which is a wider structure, tens to hundreds of $R_g$ at its base, with low Lorentz gamma) as the mechanism that produces the hard X-ray spectrum, we have been able to explain quantitatively a number of observed correlations. Here, we demonstrate that this outflowing corona can also explain quantitatively the observed radio - X-ray correlation. In addition, we make the following theoretical predictions for GX 339-4: 1) the radio flux in the hard and hard-intermediate states should be a bell-shaped curve as a function of the photon-number spectral index Gamma, 2) the radio - X-ray correlation should break down when the source moves from the hard to the hard-intermediate state and instead the radio flux should first increase sharply in the hard-intermediate state and then decrease also sharply, in a very narrow range of the X-ray flux, and 3) the X-ray polarization will be parallel to the outflow in the hard state and perpendicular to it in the hard-intermediate one.
description: Accepted for publication in A&A
Coxeter groups and Kähler groups
Creators: name: Py, Pierre
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E99, 53C55

description: We study homomorphisms from Kähler groups to Coxeter groups. As an application, we prove that a cocompact complex hyperbolic lattice (in complex dimension at least 2) does not embedd into a Coxeter group or a right-angled Artin group. This is in contrast with the case of real hyperbolic lattices.
description: 10 pages, the proofs of the corollaries have been slightly simplified, the referee's comments have been included
An accurate mass and radius measurement for an ultracool white dwarf
Creators: name: Parsons, S. G.
name: Gänsicke, B. T.
name: Marsh, T. R.
name: Bergeron, P.
name: Copperwheat, C. M.
name: Dhillon, V. S.
name: Bento, J.
name: Littlefair, S. P.
name: Schreiber, M. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Studies of cool white dwarfs in the solar neighbourhood have placed a limit on the age of the Galactic disk of 8-9 billion years. However, determining their cooling ages requires the knowledge of their effective temperatures, masses, radii, and atmospheric composition. So far, these parameters could only be inferred for a small number of ultracool white dwarfs for which an accurate distance is known, by fitting their spectral energy distributions (SEDs) in conjunction with a theoretical mass-radius relation. However, the mass-radius relation remains largely untested, and the derived cooling ages are hence model-dependent. Here we report direct measurements of the mass and radius of an ultracool white dwarf in the double-lined eclipsing binary SDSS J013851.54-001621.6. We find M(WD)=0.529+/-0.010Msol and R(WD)=0.0131+/-0.0003Rsol. Our measurements are consistent with the mass-radius relation and we determine a robust cooling age of 9.5 billion years for the 3570K white dwarf. We find that the mass and radius of the low mass companion star, M(sec)=0.132+/-0.003Msol and R(sec)=0.165+/-0.001Rsol, are in agreement with evolutionary models. We also find evidence that this >9.5 Gyr old M5 star is still active, far beyond the activity lifetime for a star of its spectral type. This is likely caused by the high tidally-enforced rotation rate of the star. The companion star is close to filling its Roche lobe and the system will evolve into a cataclysmic variable in only 70 Myr. Our direct measurements demonstrate that this system can be used to calibrate ultracool white dwarf atmospheric models.
description: 9 pages, 9 figures and 4 tables. Accepted for publication in MNRAS
Dynamics, crystallization and structures in colloid spin coating
Creators: name: Pichumani, Moorthi
name: Bagheri, Payam
name: Poduska, Kristin M.
name: Gonzalez-Vinas, Wenceslao
name: Yethiraj, Anand
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Spin coating is an out-of-equilibrium technique for producing polymer films and colloidal crystals quickly and reproducibly. In this review, we present an overview of theoretical and experimental studies of the spin coating of colloidal suspensions. The dynamics of the spin coating process is discussed first, and we present insights from both theory and experiment. A key difference between spin coating with polymer solutions and with monodisperse colloidal suspensions is the emergence of long range (centimeter scale) orientational correlations in the latter. We discuss experiments in different physical regimes that shed light on the many unusual partially-ordered structures that have long-range orientational order, but no long-range translational order. The nature of these structures can be tailored by adding electric or magnetic fields during the spin coating procedure. These partially-ordered structures can be considered as model systems for studying the fundamentals of poorly crystalline and defect-rich solids, and they can also serve as templates for patterned and/or porous optical and magnetic materials.
description: revised manuscript, re-submitted to Soft Matter
title: Η εφαρμογή των ελληνικών λογιστικών προτύπων στο φορολογικό έλεγχο των επιχειρήσεων
title: The application of Greek accounting standards in the tax audit of companies
Creators: name: Μακριδακη Ευτυχια-Παναγιωτα
Publisher: name: Technical University of Crete
Year: 2022

description: Βιβλιογραφική ανασκόπηση των Ελληνικών Λογιστικών Προτύπων και πώς αυτά καθορίζουν τον φορολογικό έλεγχο στην Ελλάδα. Τα ΕΛΠ ως σύνολο κανόνων που διέπουν την λογιστικά και φορολογική διαχείριση των οντοτήτων και οι ιδιαιτερότητες τους. Ο φορολογικός έλεγχος των επιχειρήσεων ως προς τις μεθόδους με τις οποίες γίνεται και το αποτέλεσμα που επιφέρει στις επιχειρήσεις.
A topological state sum model for fermions on the circle
Creators: name: Barrett, John W.
name: Kerr, Steven
name: Louko, Jorma
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81T25, 81T45

description: A simple state sum model for fermions on a 1-manifold is constructed. The model is independent of the triangulation and gives exactly the same partition function as the Dirac functional integral with zeta-function regularisation. Some implications for more realistic physical models are discussed.
description: 20 pages. v2: minor corrections, reference added
Disorder in the non-linear anomalous Hall effect of $\mathcal{P}\mathcal{T}$-symmetric Dirac fermions
Creators: name: Atencia, Rhonald Burgos
name: Xiao, Di
name: Culcer, Dimitrie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The study of the non-linear anomalous Hall effect (NLAHE) in $\mathcal{P}\mathcal{T}$-symmetric systems has focussed on intrinsic mechanisms. Here we show that disorder contributes substantially to NLAHE and often overwhelms intrinsic terms. We identify terms to zeroth order in the disorder strength involving the Berry curvature dipole, skew scattering and side-jump, all exhibiting a strong peak as a function of the Fermi energy, a signature of interband coherence. Our results suggest NLAHE at experimentally relevant transport densities in $\mathcal{P}\mathcal{T}$-symmetric systems is likely to be extrinsic.
description: 5 pages, 3 figures
Hysteresis and thermal limit cycles in MRI simulations of accretion discs
Creators: name: Latter, Henrik N.
name: Papaloizou, John C. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The recurrent outbursts that characterise low-mass binary systems reflect thermal state changes in their associated accretion discs. The observed outbursts are connected to the strong variation in disc opacity as hydrogen ionises near 5000 K. This physics leads to accretion disc models that exhibit bistability and thermal limit cycles, whereby the disc jumps between a family of cool and low accreting states and a family of hot and efficiently accreting states. Previous models have parametrised the disc turbulence via an alpha (or `eddy') viscosity. In this paper we treat the turbulence more realistically via a suite of numerical simulations of the magnetorotational instability (MRI) in local geometry. Radiative cooling is included via a simple but physically motivated prescription. We show the existence of bistable equilibria and thus the prospect of thermal limit cycles, and in so doing demonstrate that MRI-induced turbulence is compatible with the classical theory. Our simulations also show that the turbulent stress and pressure perturbations are only weakly dependent on each other on orbital times; as a consequence, thermal instability connected to variations in turbulent heating (as opposed to radiative cooling) is unlikely to operate, in agreement with previous numerical results. Our work presents a first step towards unifying simulations of full MHD turbulence with the correct thermal and radiative physics of the outbursting discs associated with dwarf novae, low-mass X-ray binaries, and possibly young stellar objects.
description: 15 pages, 8 figures, 4 tables; MNRAS, accepted; v2 minor corrections and clarifications
Transport Measurement of Andreev Bound States in a Kondo-Correlated Quantum Dot
Creators: name: Kim, Bum-Kyu
name: Ahn, Ye-Hwan
name: Kim, Ju-Jin
name: Choi, Mahn-Soo
name: Bae, Myung-Ho
name: Kang, Kicheon
name: Lim, Jong Soo
name: Lopez, Rosa
name: Kim, Nam
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report transport measurements of gate-tunable Andreev bound states in a carbon nanotube quantum dot coupled to two superconducting leads. In particular, we observe clear features of two types of Kondo ridges, which can be understood in terms of the interplay between the Kondo effect and superconductivity. In the first type (type I), the coupling is strong and the Kondo effect is dominant. Levels of the Andreev bound states display anti-crossing in the middle of the ridge. On the other hand, crossing of the two Andreev bound states is shown in the second type (type II) together with the 0-$π$ transition of the Josephson junction. Our scenario is well understood in terms of only a single dimensionless parameter, $k_BT_K^{min}/Δ$, where $T_K^{min}$ and $Δ$ are the minimum Kondo temperature of a ridge and the superconducting order parameter, respectively. Our observation is consistent with measurements of the critical current, and is supported by numerical renormalization group calculations.
description: 5 pages, 4 figures; typos corrected; references updated; a few more clarifications
SDT: A Low-cost and Topology-reconfigurable Testbed for Network Research
Creators: name: Chen, Zixuan
name: Zhao, Zhigao
name: Li, Zijian
name: Shao, Jiang
name: Liu, Sen
name: Xu, Yang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Network experiments are essential to network-related scientific research (e.g., congestion control, QoS, network topology design, and traffic engineering). However, (re)configuring various topologies on a real testbed is expensive, time-consuming, and error-prone. In this paper, we propose \emph{Software Defined Topology Testbed (SDT)}, a method for constructing a user-defined network topology using a few commodity switches. SDT is low-cost, deployment-friendly, and reconfigurable, which can run multiple sets of experiments under different topologies by simply using different topology configuration files at the controller we designed. We implement a prototype of SDT and conduct numerous experiments. Evaluations show that SDT only introduces at most 2\% extra overhead than full testbeds on multi-hop latency and is far more efficient than software simulators (reducing the evaluation time by up to 2899x). SDT is more cost-effective and scalable than existing Topology Projection (TP) solutions. Further experiments show that SDT can support various network research experiments at a low cost on topics including but not limited to topology design, congestion control, and traffic engineering.
description: This paper will be published in IEEE CLUSTER 2023. Preview version only
Searching for the Origin of CP violation in Cabibbo Suppressed D-meson Decays
Creators: name: Atwood, David
name: Soni, Amarjit
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The recent evidence of large direct CP violation in D0 decay at LHCb suggests that such CP studies may become an important avenue for understanding CP. In this paper, we make several suggestions to try to clarify the role of new physics in these results. We propose that the enhancement needed in the Standard Model to attribute the observed CP violation in D to two pseudoscalar modes may not operate for inclusive final states where asymmetries will likely approximate the quark level expectation. Experimentally testing this principle requires a search for CP asymmetries in final states containing K and K-bar with a total energy of less than M_D. We also propose that CP asymmetries may be enhanced in modes where the tree is color suppressed. In particular, the final state rho0 rho0 is of special interest; similarly Ds-> rho0 K+ and rho0 K*+ likewise appear interesting. We discuss how isospin symmetry yields observables sensitive to certain classes of new physics and suppressed in the Standard Model. Some modes considered in this context are D-> pi pi, rho pi, rho rho as well as Ds-> K* pi. We also consider how such analysis may eventually be supplemented by information about the weak phases in D0 decay. In order to obtain this information experimentally, we consider various methods for preparing an initial state which is a quantum mechanical mixture of D0 and D0-bar. This may be done through the use of natural D0 D0-bar oscillations; observing D0-mesons which arise from Bd or Bs mesons which themselves are oscillating or from quantum correlations in D0 pairs which arise from either psi" decay or B-meson decay. Observing CP violation in the magnitudes of decay amplitudes should be within the capability of experiments in the near future however obtaining the weak phases through the methods we discuss will likely require future generations of machines.
description: 21 pages, 4 figures, 1 table; Version to appear in journal
Holographic CFTs on $AdS_d\times S^n$ and conformal defects
Creators: name: Ghodsi, Ahmad
name: Kiritsis, Elias
name: Nitti, Francesco
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider ($d+n+1$)-dimensional solutions of Einstein gravity with constant negative curvature. Regular solutions of this type are expected to be dual to the ground states of ($d+n$)-dimensional holographic CFTs on $AdS_d\times S^n$. Their only dimensionless parameter is the ratio of radii of curvatures of $AdS_d$ and $S^n$. The same solutions may also be dual to $(d-1)$-dimensional conformal defects in holographic QFT$_{d+n}$. We solve the gravity equations with an associated conifold ansatz, and we classify all solutions both singular and regular by a combination of analytical and numerical techniques. There are no solutions, regular or singular, with two boundaries along the holographic direction. Out of the infinite class of regular solutions, only one is diffeomorphic to $AdS_{d+n+1}$ and another to $AdS_d\times AdS_{n+1}$. For the regular solutions, we compute the on-shell action as a function of the relevant parameters.
description: 75 pages, 23 figures
Testing external photoevaporation in the $σ$-Orionis cluster with spectroscopy and disk mass measurements
Creators: name: Maucó, K.
name: Manara, C. F.
name: Ansdell, M.
name: Bettoni, G.
name: Claes, R.
name: Alcala, J.
name: Miotello, A.
name: Facchini, S.
name: Haworth, T. J.
name: Lodato, G.
name: Williams, J. P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The evolution of protoplanetary disks is regulated by an interplay of several processes, either internal to the system or related to the environment. As most of the stars and planets have formed in massive stellar clusters, studying the effects of UV radiation on disk evolution is of paramount importance. Here we test the impact of external photoevaporation on the evolution of disks in the $σ$ Orionis cluster by conducting the first combined large-scale UV to IR spectroscopic and mm-continuum survey of this region. We study a sample of 50 targets located at increasing distances from the central, OB system $σ$ Ori. We combine new VLT/X-Shooter spectra with new and previously published ALMA measurements of disk dust and gas fluxes and masses. We confirm the previously found decrease of $M_{\rm dust}$ in the inner $\sim$0.5 pc of the cluster. This is particularly evident when considering the disks around the more massive stars ($\ge$ 0.4 $M_{\odot}$), where those located in the inner part ($<$ 0.5 pc) have $M_{\rm dust}$ about an order of magnitude lower than the more distant ones. About half of the sample is located in the region of the $\dot{M}_{\rm acc}$ vs $M_{\rm disk}$ expected by models of external photoevaporation, namely showing shorter disk lifetimes. These are observed for all targets with projected separation from $σ$ Ori $<$ 0.5 pc, proving that the presence of a massive stellar system affects disk evolution. External photoevaporation is a viable mechanism to explain the observed shorter disk lifetimes and lower $M_{\rm dust}$ in the inner $\sim$0.5 pc of the cluster. Follow-up observations of the low stellar mass targets are crucial to confirm the dependence of the external photoevaporation process with stellar host mass. This work confirms that the effects of external photoevaporation are significant down to impinging radiation as low as $\sim 10^{4}$ G$_0$.
description: Accepted for publication on Astronomy & Astrophysics. 13 pages, 7 figures + appendix. Abstract abridged to meet arXiv requirements
Der Wandel der Familie wird überschätzt
Creators: name: Correll, Lena
Publisher: name: querelles-net
Year: 2010
Subjects: Familie; Geschlecht; Gender

description: Seit mehren Jahrzehnten wird regelmäßig in den Medien der Untergang der Familie beschworen. Der Artikel zeigt, dass der Wandel in Deutschland weit weniger ausgeprägt ist, als zumeist angenommen wird. Zum einen besteht die deutliche Mehrheit der Familien noch immer aus ‚traditionellen‘ Kleinfamilien (Ehemann/-frau und Kind/ern), und außerdem ist die Vielfalt der Familienformen begrenzt. Eine Betrachtung in historischer Perspektive belegt zudem, dass die Pluralisierung der Familienformen früher weitaus stärker ausgeprägt war. Heutzutage kann überhaupt nur von einer Pluralisierung von Lebens- und Familienformen gesprochen werden, wenn als Referenzrahmen das ‚goldene Zeitalter der Ehe und Familie‘ (die 1950er/60er Jahre in Westdeutschland) herangezogen wird. Die begrenzte Pluralisierung der Familienformen ist nicht zufällig. Familienformen sind auch heutzutage nicht komplett frei wählbar; das wohlfahrtsstaatliche System in Deutschland stützt nach wie vor die traditionelle Kleinfamilie und wertet andere Lebensentwürfe demgegenüber ab.
description: querelles-net, Jg. 11, Nr. 2 (2010): Familie
RESEARCH & DOCUMENTATION THAT CRITICALLY EXAMINES HOW ARTISTIC TRADITIONS ARE CONSTRUCTED OR REINVENTED
Creators: name: Bhaduri, Ayona
Publisher: name: Zenodo
Year: 2020
Subjects: Dance, Architecture, Intangible Cultural Heritage

description: ABSTRACT In striving to discover the genuine and original portions of our great epic The Mahabharata, out of whose final form of 1,00,000 verses, only 24,000 seem to bear the stamp of originality of Vyasa, Sri Aurobindo, in his The Mahabharata: Essays & Translation s , observes that, “One is struck in perusing the Mahabharata by the presence of a mass of poetry which bears the style and impress of a single, strong and original, even 1 unusual mind” Such may be said in unanimity regarding the vast body of work in Odissi dance created by Guru Kelucharan Mahapatra as well. Because, the classical dances of India, and therefore Kelubabu’s compositions, are not just poetry in motion but are indeed poetry i each is set to. n motion in response to the music The practice of Indian classical dance should lead the dancer from outside herself to within, physically, emotionally and spiritually, and it is to be able to achieve this, that the repertoire of every clas sical form is structured as such. The Odissi repertoire too, as structured by Kelubabu, begins with Mangalacharan, an invocation by the dancer/devotee at the entrance to the temple, proceeds to circumambulate the temple structure depicting the exquisite b eauty in various bhangis sculpted on the temple walls through Batu, then advancing through the Natya Mandapa with the joyous Pallavi, enters the Garbha griha with the selfreflective Abhinaya, an Ashatapadi wherein she is in private conversation with her Lord, finally leading to Moshya Nata, the dance of liberation. Thus, the repertoire leads the dancer from collective external consciousness to singular internal consciousness such that in Mokshya Nata a moment of absolute peace and stillness is reached when the dancer is in total union while in movement with her Atma or soul within.
description: Funded by ICH Grant 2014-15 from Ministry of Culture, Government of India
Stretchable liquid crystal blue phase gels
Creators: name: Castles, F.
name: Morris, S. M.
name: Hung, J. M. C.
name: Qasim, M. M.
name: Wright, A. D.
name: Nosheen, S.
name: Choi, S. S.
name: Outram, B. I.
name: Elston, S. J.
name: Burgess, C.
name: Hill, L.
name: Wilkinson, T. D.
name: Coles, H. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Liquid crystalline polymers are materials of considerable scientific interest and technological value to society [1-3]. An important subset of such materials exhibit rubber-like elasticity; these can combine the remarkable optical properties of liquid crystals with the favourable mechanical properties of rubber and, further, exhibit behaviour not seen in either type of material independently [2]. Many of their properties depend crucially on the particular mesophase employed. Stretchable liquid crystalline polymers have previously been demonstrated in the nematic, chiral nematic, and smectic mesophases [2,4]. Here were report the fabrication of a stretchable gel of blue phase I, which forms a self-assembled, three-dimensional photonic crystal that may have its optical properties manipulated by an applied strain and, further, remains electro-optically switchable under a moderate applied voltage. We find that, unlike its undistorted counterpart, a mechanically deformed blue phase exhibits a Pockels electro-optic effect, which sets out new theoretical challenges and new possibilities for low-voltage electro-optic devices.
description: 15 pages, 6 figures, additional data and discussion included. Supplementary videos available from F. Castles on request
Holographic description of the dissipative unified dark fluid model with axion field
Creators: name: Brevik, I.
name: Timoshkin, A. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article we extend an axion F(R) gravity model, and apply the holographic principle to describe in a unifying manner the early and the late-time universe when the general equation of state (EoS) contains a bulk viscosity. We assume a spatially flat Friedmann-Robertson-Walker (FRW) universe model. We use a description based on the generalized infrared-cutoff holographic dark energy proposed by Nojiri and Odintsov (2006, 2017), and explore the evolution of the universe when the EoS describes the asymptotic behavior between the dust in the early universe and the late universe. We explore various forms of the bulk viscosity, and calculate analytical expressions for the infrared cutoffs in terms of the particle horizon. In this way we obtain a unifying description of the early and the late-time universe in the presence of axion matter, via a viscous holographic fluid model.
description: 7 pages, latex 2e, to appear in Int. J. Mod. Phys. D
Non-equilibrium effects on stability of hybrid stars with first-order phase transitions
Creators: name: Rau, Peter B.
name: Salaben, Gabriela G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The stability of hybrid stars with first-order phase transitions as determined by calculating fundamental radial oscillation modes is known to differ from the predictions of the widely-used Bardeen--Thorne--Meltzer criterion. We consider the effects of out-of-chemical-equilibrium physics on the radial modes and hence stability of these objects. For a barotropic equation of state, this is done by allowing the adiabatic sound speed to differ from the equilibrium sound speed. We show that doing so extends the stable branches of stellar models, allowing stars with rapid phase transitions to support stable higher-order stellar multiplets similarly to stars with multiple slow phase transitions. We also derive a new junction condition to impose on the oscillation modes at the phase transition. Termed the reactive condition, it is physically motivated, consistent with the generalized junction conditions between two phases, and has the common rapid and slow conditions as limiting cases. Unlike the two common cases, it can only be applied to nonbarotropic stars. We apply this junction condition to hybrid stellar models generated using a two-phase equation of state consisting of nuclear matter with unpaired quark matter at high densities joined by a first-order phase transition and show that like in the slow limiting case, stars that are classically unstable are stabilized by a finite chemical reaction speed.
description: 12 pages, 8 figures
Conservation and breaking of pseudospin symmetry
Creators: name: Sun, T. -T.
name: Li, Z. P.
name: Ring, P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Pseudospin symmetry (PSS) is a relativistic dynamical symmetry connected with the lower component of the Dirac spinor. Here, we investigate the conservation and breaking of PSS in the single-nucleon resonant states, as an example, using Green's function method that provides a novel way to precisely describe not only the resonant energies and widths but also the spacial density distributions for both narrow and wide resonances. The PSS restoration and breaking are perfectly displayed in the evolution of resonant parameters and density distributions with the potential depth: In the PSS limit, i.e., when the attractive scalar and repulsive vector potentials have the same magnitude but opposite sign, PSS is exactly conserved with strictly the same energy and width between the PS partners as well as identical density distributions of the lower components. As the potential depth increases, the PSS is broken gradually with energy and width splittings and a phase shift in the density distributions.
description: 5 pages, 4 figures
JOYS: Disentangling the warm and cold material in the high-mass IRAS 23385+6053 cluster
Creators: name: Gieser, C.
name: Beuther, H.
name: van Dishoeck, E. F.
name: Francis, L.
name: van Gelder, M. L.
name: Tychoniec, L.
name: Kavanagh, P. J.
name: Perotti, G.
name: Garatti, A. Caratti o
name: Ray, T. P.
name: Klaassen, P.
name: Justtanont, K.
name: Linnartz, H.
name: Rocha, W. R. M.
name: Slavicinska, K.
name: Colina, L.
name: Güdel, M.
name: Henning, Th.
name: Lagage, P. -O.
name: Östlin, G.
name: Vandenbussche, B.
name: Waelkens, C.
name: Wright, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: (abridged) We study and compare the warm (>100 K) and cold (<100 K) material toward the high-mass star-forming region IRAS 23385+6053 (IRAS 23385 hereafter) combining high angular resolution observations in the mid-infrared (MIR) with the JWST Observations of Young protoStars (JOYS) project and with the NOEMA at mm wavelengths at angular resolutions of 0.2"-1". The spatial morphology of atomic and molecular species is investigated by line integrated intensity maps. The temperature and column density of different gas components is estimated using H2 transitions (warm and hot component) and a series of CH3CN transitions as well as 3 mm continuum emission (cold component). Toward the central dense core in IRAS 23385 the material consists of relatively cold gas and dust (~50 K), while multiple outflows create heated and/or shocked H2 and show enhanced temperatures (~400 K) along the outflow structures. An energetic outflow with enhanced emission knots of [Fe II] and [Ni II] hints at J-type shocks, while two other outflows have enhanced emission of only H2 and [S I] caused by C-type shocks. The latter two outflows are also more prominent in molecular line emission at mm wavelengths (e.g., SiO, SO, H2CO, and CH3OH). Even higher angular resolution data are needed to unambiguously identify the outflow driving sources given the clustered nature of IRAS 23385. While most of the forbidden fine structure transitions are blueshifted, [Ne II] and [Ne III] peak at the source velocity toward the MIR source A/mmA2 suggesting that the emission is originating from closer to the protostar.
description: 15 pages, 7 figures, accepted for publication in A&A
First Glimpses at Higgs' face
Creators: name: Espinosa, J. R.
name: Grojean, C.
name: Muhlleitner, M.
name: Trott, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass ~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and the Tevatron collaborations on understanding the properties of this scalar by performing joint fits on its couplings to other Standard Model particles. We discuss and characterize to what degree this resonance has the properties of the Standard Model (SM) Higgs, and consider what implications can be extracted for New Physics in a (mostly) model-independent fashion. We find that, if the Higgs couplings to fermions and weak vector bosons are allowed to differ from their standard values, the SM is ~ 2 sigma from the best fit point to current data. Fitting to a possible invisible decay branching ratio, we find BR_{inv} = 0.05\pm 0.32\ (95% C.L.) We also discuss and develop some ways of using the data in order to bound or rule out models which modify significantly the properties of this scalar resonance and apply these techniques to the global current data set.
description: 26 pages, 7 figures, v2 post ICHEP data update
Die geschichtliche Entwicklung der Heil- und Pflegeanstalt Wiesloch zwischen 1933 und 1945 in Hinblick auf die pastorale Begleitung
Creators: name: Kreß, Laura
Publisher: name: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre
Year: 2019

description: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre, Bd. 46: (2018/2019): Diakoniewissenschaft in Forschung und Lehre
A Generalized Mean-Reverting Equation and Applications
Creators: name: Marie, Nicolas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Consider a mean-reverting equation, generalized in the sense it is driven by a 1-dimensional centered Gaussian process with Hölder continuous paths on $[0,T]$ ($T > 0$). Taking that equation in rough paths sense only gives local existence of the solution because the non-explosion condition is not satisfied in general. Under natural assumptions, by using specific methods, we show the global existence and uniqueness of the solution, its integrability, the continuity and differentiability of the associated Itô map, and we provide an $L^p$-converging approximation with a rate of convergence ($p\geq 1$). The regularity of the Itô map ensures a large deviation principle, and the existence of a density with respect to the Lebesgue measure, for the solution of that generalized mean-reverting equation. Finally, we study a generalized mean-reverting pharmacokinetic model.
description: 31 pages, 1 figure
AdS null deformations with inhomogeneities
Creators: name: Narayan, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study $AdS\times X$ null deformations arising as near horizon limits of D3-brane analogs of inhomogenous plane waves. Restricting to normalizable deformations for the $AdS_5$ case, these generically correspond in the dual field theory to SYM states with lightcone momentum density $T_{++}$ varying spatially, the homogenous case studied in arXiv:1202.5935 [hep-th] corresponding to uniform $T_{++}$. All of these preserve some supersymmetry. Generically these inhomogenous solutions exhibit analogs of horizons in the interior where a timelike Killing vector becomes null. From the point of view of $x^+$-dimensional reduction, the circle pinches off on these horizon loci in the interior. We discuss similar inhomogenous solutions with asymptotically Lifshitz boundary conditions, as well as aspects of Lifshitz singularities in string constructions involving $AdS$ null deformations. We also briefly discuss holographic entanglement entropy for some of these.
description: Latex, 25pgs, v2: references, clarifications added, PRD version
Experimental observation of shear thickening oscillation
Creators: name: Nagahiro, Shin-ichiro
name: Nakanishi, Hiizu
name: Mitarai, Namiko
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report experimental observation of the shear thickening oscillation, i.e. the spontaneous macroscopic oscillation in the shear flow of severe shear thickening fluid. The shear thickening oscillation is caused by the interplay between the fluid dynamics and the shear thickening, and has been predicted theoretically by the present authors using a phenomenological fluid dynamics model for the dilatant fluid, but never been reported experimentally. Using a density-matched starch-water mixture, in the cylindrical shear flow of a few centimeters flow width, we observed strong vibrations of the frequency around 20 Hz, which is consistent with our theoretical prediction.
description: 4pages, 5 figures
Planets around evolved intermediate-mass stars III. Planet candidates and long-term activity signals in six open clusters
Creators: name: Mena, E. Delgado
name: da Silva, J. Gomes
name: Faria, J. P.
name: Santos, N. C.
name: Martins, J. H.
name: Tsantaki, M.
name: Mortier, A.
name: Sousa, S. G.
name: Lovis, C.
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: [abridged]The aim of this work is to search for planets around evolved stars, with a special focus on stars more massive than 2\,M$_\odot$ in light of previous findings that show a drop in planet occurrence around stars above this mass. We used \texttt{kima} to find the Keplerian orbits most capable of explaining the periodic signals observed in RV data. We also studied the variation of stellar activity indicators and photometry in order to discard stellar signals mimicking the presence of planets. We present a planet candidate in the open cluster NGC3680 that orbits the 1.64\,M$_\odot$ star No. 41. The planet has a minimum mass of 5.13M\,$_{J}$ and a period of 1155 days. We also present periodic and large-amplitude RV signals of probable stellar origin in two more massive stars (5.84 and 3.05\,M$_\odot$ in the clusters NGC2345 and NGC3532). Finally, using new data, we revise the RV signals of the three stars analysed in our previous paper. We confirm the stellar origin of the signals observed in NGC2423 No. 3 and NGC4349 No. 127. On the other hand, the new data collected for IC4651 No. 9122 (1.79\,M$_\odot$) seem to support the presence of a bona fide planet of 6.22M\,$_{J}$ at a period of 744 days, although more data will be needed to discard a possible correlation with the CCF-FWHM. The targets presented in this work showcase the difficulties in interpreting RV data for evolved massive stars. The use of several activity indicators (CCF-FWHM, CCF-BIS, \ha), photometry, and long-term observations (covering several orbital and stellar rotational periods) is required to discern the true nature of the signals. However, in some cases, all this information is insufficient, and the inclusion of additional data -- such as the determination of magnetic field variability or RV points in the near-infrared -- will be necessary to identify the nature of the discovered signals.
description: accepted in A&A
Kompetenzfelder für die Personalentwicklung von Diakon*innen
Creators: name: Ihlein, Matthias
Publisher: name: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre
Year: 2019

description: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre, Bd. 46: (2018/2019): Diakoniewissenschaft in Forschung und Lehre
Geometry of quantum observables and thermodynamics of small systems
Creators: name: Olshanii, Maxim
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The concept of ergodicity---the convergence of the temporal averages of observables to their ensemble averages---is the cornerstone of thermodynamics. The transition from a predictable, integrable behavior to ergodicity is one of the most difficult physical phenomena to treat; the celebrated KAM theorem is the prime example. This Letter is founded on the observation that for many classical and quantum observables, the sum of the ensemble variance of the temporal average and the ensemble average of temporal variance remains constant across the integrability-ergodicity transition. We show that this property induces a particular geometry of quantum observables---Frobenius (also known as Hilbert-Schmidt) one---that naturally encodes all the phenomena associated with the emergence of ergodicity: the Eigenstate Thermalization effect, the decrease in the inverse participation ratio, and the disappearance of the integrals of motion. As an application, we use this geometry to solve a known problem of optimization of the set of conserved quantities---regardless of whether it comes from symmetries or from finite-size effects---to be incorporated in an extended thermodynamical theory of integrable, near-integrable, or mesoscopic systems.
„Vom aktivierenden Sozialstaat zum Bedingungslosen Grundeinkommen
Creators: name: Schweizer, Dorothea
Publisher: name: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre
Year: 2019

description: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre, Bd. 46: (2018/2019): Diakoniewissenschaft in Forschung und Lehre
Valley-polarization and stable triplet exciton formation in 2D lateral heterostrcuture of hBN-kagome and graphene
Creators: name: Adhikary, Souren
name: Mohakud, Sasmita
name: Dutta, Sudipta
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Broken spatial inversion symmetry in semiconducting materials with time-reversal pair valleys can exhibit valley polarization. Based on first-principles calculations, here we propose a lateral heterostructure of kagome lattice of hBN and hexagonal graphene domains that exhibits opposite Berry curvature in inequivalent K and K' valleys. Explicit consideration of excitonic scattering processes within GW and Bethe-Salpeter equation formalism confirm insignificant intervalley coupling and consequent valley polarization ability along with 0.46 eV higher binding energy of triplet excitons. Such heterostructure with large charge carrier mobility can be exploited for advanced valleytronic and optoelectronic applications.
description: 26 pages, 10 figures
Ideal Multipole Ion Traps from Planar Ring Electrodes
Creators: name: Clark, Robert J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present designs for multipole ion traps based on a set of planar, annular, concentric electrodes which require only rf potentials to confine ions. We illustrate the desirable properties of the traps by considering a few simple cases of confined ions. We predict that mm-scale surface traps may have trap depths as high as tens of electron volts, or micromotion amplitudes in a 2-D ion crystal as low as tens of nanometers, when parameters of a magnitude common in the field are chosen. Several example traps are studied, and the scaling of those properties with voltage, frequency, and trap scale, for small numbers of ions, is derived. In addition, ions with very high charge-to-mass ratios may be confined in the trap, and species of very different charge-to-mass ratios may be simultaneously confined. Applications of these traps include quantum information science, frequency metrology, and cold ion-atom collisions.
description: Section on trapping of a single ion added, two figures added, one formula corrected, otherwise minor changes
Empirische Forschungsmethoden im Rahmen des Studiums der Diakoniewissenschaft
Creators: name: Renkert, Thomas
Publisher: name: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre
Year: 2019

description: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre, Bd. 46: (2018/2019): Diakoniewissenschaft in Forschung und Lehre
Magnetic susceptibility of QCD at zero and at finite temperature from the lattice
Creators: name: Bali, G. S.
name: Bruckmann, F.
name: Constantinou, M.
name: Costa, M.
name: Endrodi, G.
name: Katz, S. D.
name: Panagopoulos, H.
name: Schaefer, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The response of the QCD vacuum to a constant external (electro)magnetic field is studied through the tensor polarization of the chiral condensate and the magnetic susceptibility at zero and at finite temperature. We determine these quantities using lattice configurations generated with the tree-level Symanzik improved gauge action and N_f=1+1+1 flavors of stout smeared staggered quarks with physical masses. We carry out the renormalization of the observables under study and perform the continuum limit both at T>0 and at T=0, using different lattice spacings. Finite size effects are studied by using various spatial lattice volumes. The magnetic susceptibilities χ_f reveal a diamagnetic behavior; we obtain at zero temperature χ_u=-(2.08 +/- 0.08) 1/GeV^2, χ_d=-(2.02 +/- 0.09) 1/GeV^2 and χ_s=-(3.4 +/- 1.4) 1/GeV^2 for the up, down and strange quarks, respectively, in the MSBar scheme at a renormalization scale of 2 GeV. We also find the polarization to change smoothly with the temperature in the confinement phase and then to drastically reduce around the transition region.
description: Version accepted for publication in PRD. 13 pages, 5 figures
Consistent interactions and involution
Creators: name: Kaparulin, D. S.
name: Lyakhovich, S. L.
name: Sharapov, A. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Starting from the concept of involution of field equations, a universal method is proposed for constructing consistent interactions between the fields. The method equally well applies to the Lagrangian and non-Lagrangian equations and it is explicitly covariant. No auxiliary fields are introduced. The equations may have (or have no) gauge symmetry and/or second class constraints in Hamiltonian formalism, providing the theory admits a Hamiltonian description. In every case the method identifies all the consistent interactions.
description: Minor misprints corrected, to appear in JHEP
M. Dinges (Hg.), Hausväter, Priester, Kastraten. Zur Konstruktion von Männlichkeit im Spätmittelalter und Früher Neuzeit, 1998
Creators: name: Michaud, C.
Publisher: name: Francia
Year: 2019

description: -
description: Francia, Bd. 26 Nr. 2 (1999)
Security of the decoy-state BB84 protocol with imperfect state preparation
Creators: name: Reutov, Aleksei
name: Tayduganov, Andrey
name: Mayboroda, Vladimir
name: Fat'yanov, Oleg
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum key distribution (QKD) allows two remote users to share a common information-theoretic secure secret key. In order to guarantee the security of a practical QKD implementation, the physical system has to be fully characterized and all deviations from the ideal protocol due to various imperfections of realistic devices have to be taken into account in the security proof. In this work, we study the security of the efficient decoy-state BB84 QKD protocol in the presence of source flaws, caused by imperfect intensity and polarization modulation. We investigate the non-Poissonian photon-number statistics due to coherent-state intensity fluctuations and the basis-dependence of the source due to non-ideal polarization state preparation. The analysis is supported by experimental characterization of intensity and phase distributions.
description: 22 pages, 7 figures