cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analogue of the Duistermaat-van der Kallen Theorem for Group Algebras
Creators: name: Zhao, Wenhua
name: Willems, Roel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Rings and Algebras (math.RA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 16S34, 16N40, 16D99

description: Let $G$ be a group, $R$ an integral domain, and $V_G$ the subspace of the group algebra $R[G]$ consisting of all the elements of $R[G]$ whose coefficient of the identity element $1_G$ of $G$ is equal to zero. Motivated by the Mathieu conjecture [M], the Duistermaat-van der Kallen theorem [DK], and also by recent studies on the notion of Mathieu subspaces introduced in [Z4] and [Z6], we show that for finite groups $G$, $V_G$ under certain conditions also forms a Mathieu subspace of the group algebra $R[G]$. We also show that for the free abelian groups $G=\Bbb Z^n$ $(n\ge 1)$ and any integral domain $R$ of positive characteristic, $V_G$ fails to be a Mathieu subspace of $R[G]$, which is equivalent to saying that the Duistermaat-van der Kallen theorem [DK] cannot be generalized to any field or integral domain of positive characteristic.
description: Latex, 17 pages
Letters from Charlotte C. Frowein, mother of W.C. Röntgen to Mrs. Gunning and a thank you letter from Röntgen to the Gunning family. Translation from Dutch and German.
Creators: name: Simon, Kees J.
Publisher: name: Zenodo
Year: 2024

description: In 1970, Wilhelm Conrad Röntgen's biographer published three letters from Wilhelm's mother, Charlotte Constance Frowein, to Mrs Gunning, the wife of the chemist Jan Willem Gunning. Röntgen was part of the Gunning family from 1862 to 1865. The correspondence sheds a special light on Röntgen. An attempt has been made to translate  the letters into English.
Mathieu Subspaces of Univariate Polynomial Algebras
Creators: name: Essen, Arno van den
name: Zhao, Wenhua
Publisher: name: arXiv
Year: 2010
Subjects: subject: Commutative Algebra (math.AC)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 13F20, 13C99, 33C45, 14R15

description: We first give a characterization for Mathieu subspaces of univariate polynomial algebras over fields in terms of their radicals. We then deduce that for some classes of classical univariate orthogonal polynomials the Image Conjecture is true. We also prove two special cases of the one-dimensional Image Conjecture for univariate polynomial algebras $A[t]$ over commutative $\Bbb Q$-algebras $A$.
description: Latex, 22 pages
A Minimal Model of Gravitino Dark Matter
Creators: name: Benakli, Karim
name: Chen, Yifan
name: Dudas, Emilian
name: Mambrini, Yann
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by the absence of signals of new physics in both searches for new particles at LHC and for a Weakly Interacting Massive Particle (WIMP) dark matter candidate, we consider a scenario where supersymmetry is broken at a scale above the reheating temperature. The low energy particle content consists then only in Standard Model states and a gravitino. We investigate the possibility that the latter provides the main component of dark matter through a freeze in mechanism from annihilation of thermalized Standard Model particles. We focus on the case where its production through scattering in the thermal plasma is well approximated by the non-linear supersymmetric effective Lagrangian of the associated goldstino and identify the parameter space allowed by the cosmological constraints, allowing the possibility of large reheating temperature compatible with leptogenesis scenarios, alleviating the so called "gravitino problem".
description: 9 pages, 2 figures, published version (references added)
The Gaussian Moments Conjecture and the Jacobian Conjecture
Creators: name: Derksen, Harm
name: Essen, Arno van den
name: Zhao, Wenhua
Publisher: name: arXiv
Year: 2015
Subjects: subject: Commutative Algebra (math.AC)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 14R15, 62H86

description: We first propose what we call the Gaussian Moments Conjecture. We then show that the Jacobian Conjecture follows from the Gaussian Moments Conjecture. We also give a counter-example to a more general statement known as the Moments Vanishing Conjecture .
Eta invariants and the hypoelliptic Laplacian
Creators: name: Bismut, Jean-Michel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: The purpose of this paper is to give a new proof of results of Moscovici and Stanton on the orbital integrals associated with eta invariants on compact locally symmetric spaces. Moscovici and Stanton used methods of harmonic analysis on reductive groups. Here, we combine our approach to orbital integrals using the hypoelliptic Laplacian, with the introduction of a rotation on certain Clifford algebras. Probabilistic methods play an important role in establishing key estimates. In particular, we construct the proper It{ô} calculus associated with certain hypoelliptic diffusions.
Additional file 4 of PretoxTM: a text mining system for extracting treatment-related findings from preclinical toxicology reports
Creators: name: Corvi, Javier
name: Díaz-Roussel, Nicolás
name: Fernández, José M.
name: Ronzano, Francesco
name: Centeno, Emilio
name: Accuosto, Pablo
name: Ibrahim, Celine
name: Asakura, Shoji
name: Bringezu, Frank
name: Fröhlicher, Mirjam
name: Kreuchwig, Annika
name: Nogami, Yoko
name: Rih, Jeong
name: Rodriguez-Esteban, Raul
name: Sajot, Nicolas
name: Wichard, Joerg
name: Wu, Heng-Yi Michael
name: Drew, Philip
name: Steger-Hartmann, Thomas
name: Valencia, Alfonso
name: Furlong, Laura I.
name: Capella-Gutierrez, Salvador
Publisher: name: figshare
Year: 2025
Subjects: Pharmacology
Biotechnology
Information Systems not elsewhere classified
Cancer
Science Policy

description: Additional file 4.
Toward a measurement of the effective gauge field and the Born-Huang potential with atoms in chip traps
Creators: name: Gürkan, Zeynep Nilhan
name: Sjöqvist, Erik
name: Hessmo, Björn
name: Grémaud, Benoît
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study magnetic traps with very high trap frequencies where the spin is coupled to the motion of the atom. This allows us to investigate how the Born-Oppenheimer approximation fails and how effective magnetic and electric fields appear as the consequence of the non-adiabatic dynamics. The results are based on exact numerical diagonalization of the full Hamiltonian describing the coupling between the internal and external degrees of freedom. The position in energy and the decay rate of the trapping states correspond to the imaginary part of the resonances of this Hamiltonian and are computed using the complex rotation method.
description: 7 pages, 4 figures, 1 table
$\mathcal{PT}$ symmetric phase transition and single-photon transmission in an optical trimmer system
Creators: name: Xue, L. F.
name: Gong, Z. R.
name: Zhu, H. B.
name: Wang, Z. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The parity-time ($\mathcal{PT}$) symmetric structures have exhibited potential applications in developing various robust quantum devices. In an optical trimmer with balanced loss and gain, we analytically study the $\mathcal{PT}$ symmetric phase transition by investigating the spontaneous symmetric breaking. We also illustrate the single-photon transmission behaviors in both of the $\mathcal{PT}$ symmetric and $\mathcal{PT}$ symmetry broken phases. We find (i) the non-periodical dynamics of single-photon transmission in the $\mathcal{PT}$ symmetry broken phase instead of $\mathcal{PT}$ symmetric phase can be regarded as a signature of phase transition; and (ii) it shows unidirectional single-photon transmission behavior in both of the phases but comes from different underlying physical mechanisms. The obtained results may be useful to implement the photonic devices based on coupled-cavity system.
description: 6 Pages, 4 figures, All the comments are welcomed
Green point-to-point logistics at Kalasin: A case study of rice transportation
Creators: name: Arjaree Saengsathien
name: Krissada Namchimplee
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2022
Subjects: Rice
Green supply chain
Green logistics
Kalasin
Transportation

description: Engineering and Applied Science Research, 49, 6, 772-779
Asymptotic Optimality of Power-of-$d$ Load Balancing in Large-Scale Systems
Creators: name: Mukherjee, Debankur
name: Borst, Sem C.
name: van Leeuwaarden, Johan S. H.
name: Whiting, Philip A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a system of $N$ identical server pools and a single dispatcher where tasks arrive as a Poisson process of rate $λ(N)$. Arriving tasks cannot be queued, and must immediately be assigned to one of the server pools to start execution, or discarded. The execution times are assumed to be exponentially distributed with unit mean, and do not depend on the number of other tasks receiving service. However, the experienced performance (e.g. in terms of received throughput) does degrade with an increasing number of concurrent tasks at the same server pool. The dispatcher therefore aims to evenly distribute the tasks across the various server pools. Specifically, when a task arrives, the dispatcher assigns it to the server pool with the minimum number of tasks among $d(N)$ randomly selected server pools. This assignment strategy is called the JSQ$(d(N))$ scheme, as it resembles the power-of-$d$ version of the Join-the-Shortest-Queue (JSQ) policy, and will also be referred to as such in the special case $d(N) = N$. We construct a stochastic coupling to bound the difference in the system occupancy processes between the JSQ policy and a scheme with an arbitrary value of $d(N)$. We use the coupling to derive the fluid limit in case $d(N) \to \infty$ and $λ(N)/N \to λ$ as $N \to \infty$, along with the associated fixed point. The fluid limit turns out to be insensitive to the exact growth rate of $d(N)$, and coincides with that for the JSQ policy. We further leverage the coupling to establish that the diffusion limit corresponds to that for the JSQ policy as well, as long as $d(N)/\sqrt{N} \log(N) \to \infty$, and characterize the common limiting diffusion process. These results indicate that the JSQ optimality can be preserved at the fluid-level and diffusion-level while reducing the overhead by nearly a factor O($N$) and O($\sqrt{N}/\log(N)$), respectively.
description: 48 pages, 3 figures, companion paper of arXiv:1612.00723
Ruling out higher-order interference from purity principles
Creators: name: Barnum, Howard
name: Lee, Ciarán M.
name: Scandolo, Carlo Maria
name: Selby, John H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As first noted by Rafael Sorkin, there is a limit to quantum interference. The interference pattern formed in a multi-slit experiment is a function of the interference patterns formed between pairs of slits, there are no genuinely new features resulting from considering three slits instead of two. Sorkin has introduced a hierarchy of mathematically conceivable higher-order interference behaviours, where classical theory lies at the first level of this hierarchy and quantum theory theory at the second. Informally, the order in this hierarchy corresponds to the number of slits on which the interference pattern has an irreducible dependence. Many authors have wondered why quantum interference is limited to the second level of this hierarchy. Does the existence of higher-order interference violate some natural physical principle that we believe should be fundamental? In the current work we show that such principles can be found which limit interference behaviour to second-order, or "quantum-like", interference, but that do not restrict us to the entire quantum formalism. We work within the operational framework of generalised probabilistic theories, and prove that any theory satisfying Causality, Purity Preservation, Pure Sharpness, and Purification---four principles that formalise the fundamental character of purity in nature---exhibits at most second-order interference. Hence these theories are, at least conceptually, very "close" to quantum theory. Along the way we show that systems in such theories correspond to Euclidean Jordan algebras. Hence, they are self-dual and, moreover, multi-slit experiments in such theories are described by pure projectors.
description: 18+8 pages. Comments welcome. v2: Minor correction to Lemma 5.1, main results are unchanged
Idempotents in Intersection of the Kernel and the Image of Locally Finite Derivations and $\mathcal E$-derivations
Creators: name: Zhao, Wenhua
Publisher: name: arXiv
Year: 2017
Subjects: subject: Rings and Algebras (math.RA)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 47B47 (primary), 08A35, 16W25, 16D99 (secondary)

description: Let $K$ be a field of characteristic zero, $\mathcal A$ a $K$-algebra and $δ$ a $K$-derivation of $\mathcal A$ or $K$-$\mathcal E$-derivation of $\mathcal A$ (i.e., $δ=\operatorname{Id}_A-ϕ$ for some $K$-algebra endomorphism $ϕ$ of $\mathcal A$). Motivated by the Idempotent conjecture proposed in [Z4], we first show that for every idempotent $e$ lying in both the kernel ${\mathcal A}^δ$ and the image $\operatorname{Im}δ\!:=δ({\mathcal A})$ of $δ$, the principal ideal $(e)\subseteq \operatorname{Im} δ$ if $δ$ is a locally finite $K$-derivation or a locally nilpotent $K$-$\mathcal E$-derivation of $\mathcal A$; and $e{\mathcal A}, {\mathcal A}e \subseteq \operatorname{Im} δ$ if $δ$ is a locally finite $K$-$\mathcal E$-derivation of $\mathcal A$. Consequently, the Idempotent conjecture holds for all locally finite $K$-derivations and all locally nilpotent $K$-$\mathcal E$-derivations of $\mathcal A$. We then show that $1_{\mathcal A} \in \operatorname{Im} δ$, (if and) only if $δ$ is surjective, which generalizes the same result [GN, W] for locally nilpotent $K$-derivations of commutative $K$-algebras to locally finite $K$-derivations and $K$-$\mathcal E$-derivations $δ$ of all $K$-algebras $\mathcal A$.
description: 16 pages
Continuous-wave operation and 10-Gb/s direct modulation of InAsP/InP sub-wavelength nanowire laser on silicon photonic crystal
Creators: name: Takiguchi, Masato
name: Yokoo, Atsushi
name: Nozaki, Kengo
name: Birowosuto, Muhammad Danang
name: Tateno, Kouta
name: Zhang, Guoqiang
name: Kuramochi, Eiichi
name: Shinya, Akihiko
name: Notomi, Masaya
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrated sub-wavelength (~111 nm diameter) single nanowire (NW) continuous wave (CW) lasers on silicon photonic crystal in the telecom-band with direct modulation at 10 Gb/s by optical pumping at cryogenic temperatures. To estimate the small signal response and pseudo-random bit sequence (PRBS) modulation of our CW lasers, we employed a new signal detection technique that employs a superconducting single photon detector and a time-correlated single photon counting module. The results showed that our NW laser was unambiguously modulated at above 10 Gb/s and an open eye pattern was obtained. This is the first demonstration of a telecom-band CW NW laser with high-speed PRBS modulation.
Antiferromagnetism in the van der Waals layered spin-lozenge semiconductor CrTe3
Creators: name: McGuire, Michael A.
name: Garlea, V. Ovidiu
name: KC, Santosh
name: Cooper, Valentino R.
name: Yan, Jiaqiang
name: Cao, Huibo
name: Sales, Brian C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The crystallographic, magnetic, and transport properties of the van der Waals bonded, layered compound CrTe3 have been investigated on single crystal and polycrystalline materials. The crystal structure contains layers made up of lozenge shaped Cr_4 tetramers. Electrical resistivity measurements show the crystals to be semiconducting, with a temperature dependence consistent with a band gap of 0.3eV. The magnetic susceptibility exhibits a broad maximum near 300K characteristic of low dimensional magnetic systems. Weak anomalies are observed in the susceptibility and heat capacity near 55K, and single crystal neutron diffraction reveals the onset of long range antiferromagnetic order at this temperature. Strongly dispersive spin-waves are observed in the ordered state. Significant magneto-elastic coupling is indicated by the anomalous temperature dependence of the lattice parameters and is apparent in structural optimization in van der Waals density functional theory calculations for different magnetic configurations. The cleavability of the compound is apparent from its handling and is confirmed by first principles calculations, which predict a cleavage energy 0.5J/m^2, similar to graphite. Based on these results, CrTe3 is identified as a promising compound for studies of low dimensional magnetism in bulk crystals as well as magnetic order in monolayer materials and van der Waals heterostructures.
SeGoFlow: A Semantic Governance Workflow Tool
Creators: name: Lieber, Sven
name: Dimou, Anastasia
name: Verborgh, Ruben
Publisher: name: Zenodo
Year: 2018
Subjects: RDF
Data Management Plan
DMP
Workflow
Provenance
W3C PROV

description: Poster for the ESWC 2018 demo paper 259: "SeGoFlow: A Semantic Governance Workflow Tool"
Yang-Baxter $σ$-models, conformal twists, and noncommutative Yang-Mills theory
Creators: name: Araujo, Thiago
name: Bakhmatov, Ilya
name: Colgáin, Eoin Ó
name: Sakamoto, Jun-ichi
name: Sheikh-Jabbari, Mohammad M.
name: Yoshida, Kentaroh
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The Yang-Baxter $σ$-model is a systematic way to generate integrable deformations of AdS$_5\times$S$^5$. We recast the deformations as seen by open strings, where the metric is undeformed AdS$_5\times$S$^5$ with constant string coupling, and all information about the deformation is encoded in the noncommutative (NC) parameter $Θ$. We identify the deformations of AdS$_5$ as twists of the conformal algebra, thus explaining the noncommutativity. We show that the unimodularity conditon on $r$-matrices for supergravity solutions translates into $Θ$ being divergence-free. Integrability of the $σ$-model for unimodular $r$-matrices implies the existence and planar integrability of the dual NC gauge theory.
description: 6 pages, no figure, v2: accepted in PRD, clarifications and references added. The title slightly changed
Drell-Yan hadron tensor: contour gauge and gluon propagator
Creators: name: Anikin, I. V.
name: Cherednikov, I. O.
name: Teryaev, O. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the gauge invariant Drell-Yan hadron tensor which includes the standard and non-standard diagram contributions. The non-standard diagram contribution is appeared owing to the complexity of the twist three $B^V(x_1,x_2)$-function where the gluon pole manifests. We use the contour gauge conception which allows us to fix easily the spurious uncertainties in the gluon propagator. The contour gauge condition is generated by the corresponding Wilson lines in both the standard and non-standard diagrams. We demonstrate the substantial role of the non-standard diagram for forming of the relevant contour in the Wilson path-ordered exponential that leads to the spurious singularity fixing.
description: 13 pages, 2 figures. The version matches PRD variant
Sideband cooling of small ion Coulomb crystals in a Penning trap
Creators: name: Stutter, G.
name: Hrmo, P.
name: Jarlaud, V.
name: Joshi, M. K.
name: Goodwin, J. F.
name: Thompson, R. C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have recently demonstrated the laser cooling of a single $^{40}$Ca$^+$ ion to the motional ground state in a Penning trap using the resolved-sideband cooling technique on the electric quadrupole transition S$_{1/2} \leftrightarrow$ D$_{5/2}$. Here we report on the extension of this technique to small ion Coulomb crystals made of two or three $^{40}$Ca$^+$ ions. Efficient cooling of the axial motion is achieved outside the Lamb-Dicke regime on a two-ion string along the magnetic field axis as well as on two- and three-ion planar crystals. Complex sideband cooling sequences are required in order to cool both axial degrees of freedom simultaneously. We measure a mean excitation after cooling of $\bar n_\text{COM}=0.30(4)$ for the centre of mass mode and $\bar n_\text{B}=0.07(3)$ for the breathing mode of the two-ion string with corresponding heating rates of 11(2) s$^{-1}$ and 1(1) s$^{-1}$ at a trap frequency of 162 kHz. The ground state occupation of the axial modes is above 75% for the two-ion planar crystal and the associated heating rates 0.8(5) s$^{-1}$ at a trap frequency of 355 kHz.
description: 14 pages, 8 figures
Connecting M-theory and type IIB parameterizations in Exceptional Field Theory
Creators: name: Sakatani, Yuho
name: Uehara, Shozo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the exceptional field theory, there are two natural parameterizations for the generalized metric; in terms of bosonic fields in the eleven-dimensional supergravity (M-theory parameterization) and the type IIB supergravity (type IIB parameterization). In order to translate various results known in the M-theory to the type IIB theory or vice versa, an explicit map between the two parameterizations will be useful. In this note, we present such a linear map. Comparing the two parameterizations under the linear map, we reproduce the known T-duality transformation rules for the supergravity fields. We also obtain the T-duality rules for non-geometric $β$-/$γ$-fields appearing in the type II theory on a torus.
description: 33 pages; v2: typos corrected, a reference added, to appear in PTEP
Statistics of particle accumulation in spatially developing turbulent boundary layers
Creators: name: Sardina, Gaetano
name: Picano, Francesco
name: Schlatter, Philip
name: Brandt, Luca
name: Casciola, Carlo Massimo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present the results of a Direct Numerical Simulation of a particle-laden spatially developing turbulent boundary layer up to Reθ = 2500. Two main features differentiate the behavior of inertial particles in a zero- pressure-gradient turbulent boundary layer from the more commonly studied case of a parallel channel flow. The first is the variation along the streamwise direction of the local dimensionless parameters defining the fluid-particle in- teractions. The second is the coexistence of an irrotational free-stream and a near-wall rotational turbulent flow. As concerns the first issue, an inner and an outer Stokes number can be defined using inner and outer flow units. The inner Stokes number governs the near-wall behavior similarly to the case of channel flow. To understand the effect of a laminar-turbulent interface, we ex- amine the behavior of particles initially released in the free stream and show that they present a distinct behavior with respect to those directly injected inside the boundary layer. A region of minimum concentration occurs inside the turbulent boundary layer at about one displacement thickness from the wall. Its formation is due to the competition between two transport mecha- nisms: a relatively slow turbulent diffusion towards the buffer layer and a fast turbophoretic drift towards the wall.
The ALP miracle: unified inflaton and dark matter
Creators: name: Daido, Ryuji
name: Takahashi, Fuminobu
name: Yin, Wen
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a scenario where both inflation and dark matter are described by a single axion-like particle (ALP) in a unified manner. In a class of the minimal axion hilltop inflation, the effective masses at the maximum and mimimum of the potential have equal magnitude but opposite sign, so that the ALP inflaton is light both during inflation and in the true vacuum. After inflation, most of the ALPs decay and evaporate into plasma through a coupling to photons, and the remaining ones become dark matter. We find that the observed CMB and matter power spectrum as well as the dark matter abundance point to an ALP of mass $m_ϕ= {\cal O}(0.01)$ eV and the axion-photon coupling $g_{ϕγγ} ={\cal O}(10^{-11})$GeV$^{-1}$: the ALP miracle. The suggested parameter region is within the reach of the next generation axion helioscope, IAXO. Furthermore, thermalized ALPs contribute to hot dark matter and its abundance is given in terms of the effective number of extra neutrino species, $ΔN_{\rm eff} \simeq 0.03$, which can be tested by the future CMB experiments. We also discuss a case with multiple ALPs, where the coupling to photons can be enhanced in the early Universe by an order of magnitude or more, which enlarges the parameter space for the ALP miracle. The heavy ALP plays a role of the waterfall field in hybrid inflation, and reheats the Universe, and it can be searched for in various experiments such as SHiP.
description: 30 pages, 9 figures, v2: references added, conclusions unchanged v3: references added, version to appear in JCAP
Mean-Square Approximation of Iterated Ito and Stratonovich Stochastic Integrals of Multiplicities 1 to 6 from the Taylor-Ito and Taylor-Stratonovich Expansions Using Legendre Polynomials
Creators: name: Kuznetsov, Dmitriy F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: The article is devoted to the practical material on expansions and mean-square approximations of specific iterated Ito and Stratonovich stochastic integrals of multiplicities 1 to 6 with respect to components of the multidimensional Wiener process on the base of the method of generalized multiple Fourier series. More precisely, we used the multiple Fourier--Legendre series converging in the sense of norm in the space $L_2([t, T]^k)$ $(k=1,\ldots,6)$ for approximation of iterated Ito and Stratonovich stochastic integrals. The considered iterated Ito and Stratonovich stochastic integrals are part of the stochastic Taylor expansions (Taylor-Ito and Taylor-Stratonovich expansions). Therefore, the results of the article can be useful for construction of the high-order strong numerical methods for Ito stochastic differential equations. Expansions of iterated Ito and Stratonovich stochastic integrals of multiplicities 1 to 6 using Legendre polynomials are derived. The convergence with probability 1 of the mentioned method of generalized multiple Fourier series is proved for iterated Ito stochastic integrals of multiplicities $k$ $(k\in\mathbb{N})$ for the cases of multiple Fourier-Legendre series and multiple trigonometric Fourier series.
description: 106 pages. Minor changes. arXiv admin note: substantial text overlap with arXiv:1712.08991, arXiv:1712.09516, arXiv:1712.09746
Properties of space-time in the vicinity of trapped regions
Creators: name: Dahal, Pravin Kumar
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: We study the near-horizon geometry in axisymmetric space-times. The general axisymmetric metrics have seven different parameters depending on three coordinates, and consistency analysis of the Einstein equations on such space-times is a formidable task. After discussing some general aspects of axially symmetric metrics, we begin the investigations of the simplest representative of this class: the Kerr–Vaidya metrics. Kerr–Vaidya metrics can be derived from the Vaidya metric by the complex coordinate transformation suggested by Newman and Janis. We show that the energy-momentum tensor belongs to type III in the Segre-Hawking- Ellis classification but has a special form with all Lorentz-invariant eigenvalues belonging to zero. It is known that the apparent horizon of the outgoing Kerr–Vaidya metric coincides with that of the Kerr space-time and that it is not so for the ingoing metric. We find its location for quasi-stationary Kerr–Vaidya black holes. The energy-momentum tensor of the Kerr- Vaidya geometries violates the null energy condition. We show that similar to the spherically symmetric accreting black hole, energy density, pressure, and flux for an infalling observer are diverging in the outgoing Kerr–Vaidya metric. This firewall leads to the violation of a specific quantum energy inequality that bounds the violation of the null energy condition.
New Constraints on Gliese 876 -- Exemplar of Mean-Motion Resonance
Creators: name: Millholland, Sarah
name: Laughlin, Gregory
name: Teske, Johanna
name: Butler, R. Paul
name: Burt, Jennifer
name: Holden, Bradford
name: Vogt, Steven
name: Crane, Jeffrey
name: Shectman, Stephen
name: Thompson, Ian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Gliese 876 harbors one of the most dynamically rich and well-studied exoplanetary systems. The nearby M4V dwarf hosts four known planets, the outer three of which are trapped in a Laplace mean-motion resonance. A thorough characterization of the complex resonant perturbations exhibited by the orbiting planets, and the chaotic dynamics therein, is key to a complete picture of the system's formation and evolutionary history. Here we present a reanalysis of the system using six years of new radial velocity (RV) data from four instruments. This new data augments and more than doubles the size of the decades-long collection of existing velocity measurements. We provide updated estimates of the system parameters by employing a computationally efficient Wisdom-Holman N-body symplectic integrator, coupled with a Gaussian Process (GP) regression model to account for correlated stellar noise. Experiments with synthetic RV data show that the dynamical characterization of the system can differ depending on whether a white noise or correlated noise model is adopted. Despite there being a region of stability for an additional planet in the resonant chain, we find no evidence for one. Our new parameter estimates place the system even deeper into resonance than previously thought and suggest that the system might be in a low energy, quasi-regular double apsidal corotation resonance. This result and others will be used in a subsequent study on the primordial migration processes responsible for the formation of the resonant chain.
description: Added the stellar mass in the caption of Table 4 in this version. 18 pages, 7 figures, published in AJ. Posterior samples available at https://github.com/smillholland/GJ876
A nonsymmetric version of Okounkov's BC-type interpolation Macdonald polynomials
Creators: name: Disveld, Niels
name: Koornwinder, Tom H.
name: Stokman, Jasper V.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 33D52, 05E05 (primary), 33D80, 05E10 (secondary)

description: Nonsymmetric interpolation Laurent polynomials in $n$ variables are introduced, with the interpolation points depending on $q$ and on a $n$-tuple of parameters $τ=(τ_1,\ldots,τ_n)$. When $τ_i=st^{n-i}$ Okounkov's $3$-parameter $BC_n$-type interpolation Macdonald polynomials are recovered from the nonsymmetric interpolation Laurent polynomials through Hecke algebra symmetrisation with respect to a type $C_n$ Hecke algebra action. In the appendix we give some conjectures about extra vanishing, based on Mathematica computations in rank two.
description: 32 pages, 9 figures; v5: thoroughly revised version, including a new introduction. To appear in Transformation Groups
Analisis Prinsip Prinsip Pembelajaran Ips
Creators: name: Septian, Amar
name: Nazar, Muhammad
name: Heri, Kusai
name: Paturahman, Maman
name: Sudrajat, Yayan
Publisher: name: Zenodo
Year: 2024

description: This research aims to process and analyze information related to (1) social studies learning and (2) social studies learning principles. This research takes the form of a literature study. The data collection method used is the documentation method for library study procedures, namely topic selection, information exploration, determining research focus, collecting data sources, reading data sources, making research notes, processing research notes, and preparing reports. The data source is bibliographic or comes from various literature, including books, journals, newspapers, personal documents, and so on. The instrument in library research is the researcher himself. The results of social science research integrate social sciences such as geography, economics, history and sociology. The research results show that (1) Social Studies has a close relationship with Social Sciences. The relationship between Social Studies and Social Sciences is that Social Sciences is based on Social Studies. However, learning at school in Social Studies is different from Social Sciences. The location of these differences lies in the level of thinking of students at the level of education. (2) The principles of social Studies learning refer to learning integration, learning interaction, continuity and change in learning material, contextual learning material.
Scalable load balancing in networked systems: A survey of recent advances
Creators: name: van der Boor, Mark
name: Borst, Sem C.
name: van Leeuwaarden, Johan S. H.
name: Mukherjee, Debankur
Publisher: name: arXiv
Year: 2018
Subjects: subject: Probability (math.PR)
subject: Performance (cs.PF)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The basic load balancing scenario involves a single dispatcher where tasks arrive that must immediately be forwarded to one of $N$ single-server queues. We discuss recent advances on scalable load balancing schemes which provide favorable delay performance when $N$ grows large, and yet only require minimal implementation overhead. Join-the-Shortest-Queue (JSQ) yields vanishing delays as $N$ grows large, as in a centralized queueing arrangement, but involves a prohibitive communication burden. In contrast, power-of-$d$ or JSQ($d$) schemes that assign an incoming task to a server with the shortest queue among $d$ servers selected uniformly at random require little communication, but lead to constant delays. In order to examine this fundamental trade-off between delay performance and implementation overhead, we consider JSQ($d(N)$) schemes where the diversity parameter $d(N)$ depends on $N$ and investigate what growth rate of $d(N)$ is required to asymptotically match the optimal JSQ performance on fluid and diffusion scale. Stochastic coupling techniques and stochastic-process limits play an instrumental role in establishing the asymptotic optimality. We demonstrate how this methodology carries over to infinite-server settings, finite buffers, multiple dispatchers, servers arranged on graph topologies, and token-based load balancing including the popular Join-the-Idle-Queue (JIQ) scheme. In this way we provide a broad overview of the many recent advances in the field. This survey extends the short review presented at ICM 2018 (arXiv:1712.08555).
description: To appear in SIAM Review. arXiv admin note: substantial text overlap with arXiv:1712.08555
Preparation of a single-photon dark state in a chiral quantum system
Creators: name: Zhu, Fengzheng
name: Zhao, Teng
name: Zhang, Hebin
name: Li, Gao-xiang
name: Ficek, Zbigniew
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine conditions under which an open quantum system composed of a driven degenerated parametric oscillator cavity and a driven two-level atom coupled to a waveguide could decay to a pure dark state rather than the expected mixed state. The calculations are carried out analytically in a low dimensional Hilbert space truncated at the double-excitation states of the combined system. The validity of the truncation is confirmed by the exact numerical analysis. It is found that one way to produce the pure state is to chirally couple the cavity and the atom to the waveguide. Another way to produce the pure state is to drive the cavity and the atom with unequal detunings. In both cases, if the driving fields are weak, the produced state is a coherent superposition of only the single-excitation and ground states of the combined system. In addition, we have found a direct correspondence between the generation of the dark state and the photon blockade effect. In other words, the generation of the dark state acts as a blockade to the number of photons so that only a single photon can be present in the cavity. We investigate the normalized second-order correlation function of the cavity field and find that the conditions under which the correlation function vanishes coincide with the conditions for the creation of the pure dark state. This system is, therefore, suggested as an alternative scheme for the generation of single-photon states.
description: published version
First-principles-based method for electron localization: Application to monolayer hexagonal boron nitride
Creators: name: Ekuma, C.
name: Dobrosavljević, V.
name: Gunlycke, D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a first-principles-based many-body typical medium dynamical cluster approximation method for characterizing electron localization in disordered structures. This method applied to monolayer hexagonal boron nitride shows that the presence of a boron vacancies could turn this wide-gap insulator into a correlated metal. Depending on the strength of the electron interactions, these calculations suggest that conduction could be obtained at a boron vacancy concentration as low as $1.0\%$. We also explore the distribution of the local density of states, a fingerprint of spatial variations, which allows localized and delocalized states to be distinguished. The presented method enables the study of disorder-driven insulator-metal transitions not only in $h$-BN but also in other physical materials.
description: 5 Pages, 4 Figures and Supplemental Material
Symmetry, Reference Frames, and Relational Quantities in Quantum Mechanics
Creators: name: Loveridge, Leon
name: Miyadera, Takayuki
name: Busch, Paul
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose that observables in quantum theory are properly understood as representatives of symmetry-invariant quantities relating one system to another, the latter to be called a reference system. We provide a rigorous mathematical language to introduce and study quantum reference systems, showing that the orthodox "absolute" quantities are good representatives of observable relative quantities if the reference state is suitably localised. We use this relational formalism to critique the literature on the relationship between reference frames and superselection rules, settling a long-standing debate on the subject.
description: Comments welcome
Dirac bi-spinor entanglement under local noise and its simulation by Jaynes-Cummings interactions
Creators: name: Bittencourt, Victor A. S. V.
name: Bernardini, Alex E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A description of the effects of the local noise on the quantum entanglement constraining the internal degrees of freedom of Dirac bi-spinor structures driven by arbitrary Poincaré invariant potentials is proposed. Given that the Dirac equation dynamics including external potentials can be simulated by a suitable four level trapped ion setup, quantum entanglement of two-qubit ionic states with quantum numbers related to the total angular momentum and to its projection onto the direction of the external magnetic field (used for lift the ions degeneracy), are recovered by means of a suitable ansatz. This formalism allows the inclusion of noise effects, which leads to disentanglement in the four level trapped ion quantum system. Our results indicate the role of interactions in bi-spinor entanglement, as well as the description of disentanglement in ionic states under local noises. For a state prepared initially in one of the ionic levels, local noise induces entanglement sudden death followed by sudden revivals driven by the noiseless dynamics of the state. Residual quantum correlations are observed in the intervals where such state is separable. Schrödinger cat and Werner states partially loose their initial entanglement content due to the interaction with the noisy environment but presenting entanglement oscillations without sudden death. Because Dirac equation describes low energy excitations of mono layer and bi-layer graphene, the formalism can also be applied to compute, for instance, electron-hole or electron/electron entanglement in various circumstances.
description: 8 pages, 2 figures. Based on a poster presentation at DICE 2016 Spacetime - Matter - Quantum Mechanics, 12th - 16th September 2016, Castiglioncello, Italy
Optimal laser pulse energy partitioning for air ionization
Creators: name: Schubert, Elise
name: Brisset, Jean-Gabriel
name: Matthews, Mary
name: Courjaud, Antoine
name: Kasparian, Jérôme
name: Wolf, Jean-Pierre
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the pulse partitioning of a 6.3 mJ, 450 fs pulse at 1030 nm to produce plasma channels. At such moderate energies, splitting the energy into several sub-pulses reduces the ionization efficiency and thus does not extend the plasma lifetime. We numerically show that when sufficient energy to produce multifilamentation is available, splitting the pulse temporally in a pulse train increases the gas temperature compared to a filament bundle of the same energy. This could improve the mean free path of the free electrons, therefore enhancing the efficiency of discharge triggering.
description: Correcting typo in Eq. (12) and unit of $\beta_{ep}$ in Table I
Measurement of the directional sensitivity of DMTPC detectors
Creators: name: Deaconu, Cosmin
name: Leyton, Michael
name: Corliss, Ross
name: Druitt, Gabriela
name: Eggleston, Richard
name: Guerrero, Natalia
name: Henderson, Shawn
name: Lopez, Jeremy
name: Monroe, Jocelyn
name: Fisher, Peter
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Dark Matter Time Projection Chamber (DMTPC) is a direction-sensitive detector designed to measure the direction of recoiling $^{19}$F and $^{12}$C nuclei in low-pressure CF$_4$ gas using optical and charge readout systems. In this paper, we employ measurements from two DMTPC detectors, with operating pressures of 30-60 torr, to develop and validate a model of the directional response and performance of such detectors as a function of recoil energy. Using our model as a benchmark, we formulate the necessary specifications for a scalable directional detector with sensitivity comparable to that of current-generation counting (non-directional) experiments, which measure only recoil energy. Assuming the performance of existing DMTPC detectors, as well as current limits on the spin-dependent WIMP-nucleus cross section, we find that a 10-20 kg scale direction-sensitive detector is capable of correlating the measured direction of nuclear recoils with the predicted direction of incident dark matter particles and providing decisive (3$σ$) confirmation that a candidate signal from a non-directional experiment was indeed induced by elastic scattering of dark matter particles off of target nuclei.
description: 13 pages, 10 figures. Accepted for publication in Phys. Rev. D. Added color figures, switched to more compact layout, and fixed some references
The expansion $\star$ mod $\bar{o}(\hbar^4)$ and computer-assisted proof schemes in the Kontsevich deformation quantization
Creators: name: Buring, Ricardo
name: Kiselev, Arthemy
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 05C22, 53D55, 68R10, 05C31, 16Z05, 53D17, 81R60, 81Q30

description: The Kontsevich deformation quantization combines Poisson dynamics, noncommutative geometry, number theory, and calculus of oriented graphs. To manage the algebra and differential calculus of series of weighted graphs, we present software modules: these allow generating the Kontsevich graphs, expanding the noncommutative $\star$-product by using a priori undetermined coefficients, and deriving linear relations between the weights of graphs. Throughout this text we illustrate the assembly of the Kontsevich $\star$-product up to order 4 in the deformation parameter $\hbar$. Already at this stage, the $\star$-product involves hundreds of graphs; expressing all their coefficients via 149 weights of basic graphs (of which 67 weights are now known exactly), we express the remaining 82 weights in terms of only 10 parameters (more specifically, in terms of only 6 parameters modulo gauge-equivalence). Finally, we outline a scheme for computer-assisted proof of the associativity, modulo $\bar{o}(\hbar^4)$, for the newly built $\star$-product expansion.
description: 77 pages, 4 figures, 10 tables, extended Discussion