cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Intelligent Software Workflow Process Design for Location Management on Mobile Devices
Creators: name: Rao, N. Mallikharjuna
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Advances in the technologies of networking, wireless communication and trimness of computers lead to the rapid development in mobile communication infrastructure, and have drastically changed information processing on mobile devices. Users carrying portable devices can freely move around, while still connected to the network. This provides flexibility in accessing information anywhere at any time. For improving more flexibility on mobile device, the new challenges in designing software systems for mobile networks include location and mobility management, channel allocation, power saving and security. In this paper, we are proposing intelligent software tool for software design on mobile devices to fulfill the new challenges on mobile location and mobility management. In this study, the proposed Business Process Redesign (BPR) concept is aims at an extension of the capabilities of an existing, widely used process modeling tool in industry with 'Intelligent' capabilities to suggest favorable alternatives to an existing software workflow design for improving flexibilities on mobile devices.
Scaling precision and build rate in additively manufactured components by melt pool control
Creators: name: Großmann, Alexander
name: Klyk, Maximilian
name: Kohn, Leonie
name: Mittelstedt, Christian
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Laser additive manufacturing (LAM) enables the fabrication of customized components. In medical applications where components contain both dense and lattice material, the process has a significant influence on the design process impacting mechanical properties and manufacturing accuracy. Currently, both build rate and strut thickness of thin-walled lattices cannot be scaled leading to low build rates, inaccurately fabricated lattices, and high unit costs. Here, a method is presented to determine the melt pool geometry material independently. The proposed scaling laws can be utilized for scaling the build rate, precise fabrication of thin-walled lattice structures, and correlating process parameters with resulting component properties.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Possibility of superradiance by magnetic nanoclusters
Creators: name: Yukalov, V. I.
name: Yukalova, E. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The possibility of realizing spin superradiance by an assembly of magnetic nanoclusters is analyzed. The known obstacles for realizing such a coherent radiation by magnetic nanoclusters are their large magnetic anisotropy, strong dephasing dipole interactions, and an essential nonuniformity of their sizes. In order to give a persuasive conclusion, a microscopic theory is developed, providing an accurate description of nanocluster spin dynamics. It is shown that, despite the obstacles, it is feasible to organize such a setup that magnetic nanoclusters would produce strong superradiant emission.
description: Latex file, 20 pages, 4 figures
Assessment of heart valve frame manufactured by laser powder bed fusion
Creators: name: Zhao, Xiao
name: Bressloff, Neil
name: Bellin, Matteo
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Typically, the frames of replacement heart valves are manufactured by laser cutting. Whilst this method limits the scope for novel concepts are made possible by additive manufacturing. With this in mind, the feasibility of manufacturing heart valve frames by laser powder bed fusion (LPBF) has been investigated based the SAPIEN 3 frame. Using stainless steel powder, this study has demonstrated the feasibility of successfully manufacturing frames with 0.4 mm cross-sectional dimensions. Although geometric accuracy and surface quality need to be improved, a low porosity of 0.5% was achieved and the frames could be successfully crimped and expanded without any breakages.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Chiral Majorana Modes via Proximity to a Twisted Cuprate Bilayer
Creators: name: Margalit, Gilad
name: Yan, Binghai
name: Franz, Marcel
name: Oreg, Yuval
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a novel heterostructure to achieve chiral topological superconductivity in 2D. A substrate with a large Rashba spin-orbit coupling energy is brought in proximity to a twisted bilayer of thin films exfoliated from a high-temperature cuprate superconductor. The combined system is then exposed to an out-of-plane magnetic field. The rare $d + id$ pairing symmetry expected to occur in such a system allows for nontrivial topology; specifically, in contrast to the case of the twisted bilayer in isolation, the substrate induces an odd Chern number. The resulting phase is characterized by the presence of a Majorana zero mode in each vortex.
description: 7 pages, 6 figures
RI-VIS D3.2 Second outreach and partnering event
Creators: name: Stechmann, Bahne
name: Beltrán, Viridiana
Publisher: name: Zenodo
Year: 2021

description: The Latin America-Europe Symposium on Research Infrastructures was organised by the RI-VIS and EU-LAC ResInfra projects, and brought together delegates from Latin American and European research infrastructures (RIs), science policy organisations and research institutions to discuss opportunities and challenges for RI cooperation between Latin America and Europe. International cooperation in science and technology is an important part of addressing major global issues like climate change, infectious diseases, food security, and natural disasters. RIs are organisations, which provide access to state-of-the-art technologies, resources, services and expertise to scientists. The RI-VIS project consortium consists of RIs across scientific disciplines to work together more efficiently and to increase their visibility among the scientific user community, global RIs and science policy organisations. RIs provide such coordination by offering a transparent access procedure to key facilities, resources and expertise on the basis of scientific excellence. They empower research beyond the individual research capacity of different countries, economic sectors, or institutions. We invited representatives from scientific communities, RI operational staff, funding agencies as well as policy makers to join and discuss opportunities for working together with the aim to bring together the right people to create collaborations and initiate networks for the benefit of all stakeholders. The RI-VIS and EU-LAC ResInfra projects share common goals to build sustainable partnerships in research infrastructure between Europe and Latin America and the Caribbean.
description: {"references": ["L. Vincenz-Donnelly, S. Fahrner, G. Pahlavan, P. Garcia, R. Pieruschka, C. Al\u00e9n Amaro, B. Stechmann, A. Buschiazzo, I. Figueroa and M. Kim, \"Recommendations towards cooperation between Latin American and European research infrastructures,\" Zenodo, p. https://zenodo.org/record/4544374, 2021."]}
Does the Babcock--Leighton Mechanism Operate on the Sun?
Creators: name: Kitchatinov, L. L.
name: Olemskoy, S. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The contribution of the Babcock-Leighton mechanism to the generation of the Sun's poloidal magnetic field is estimated from sunspot data for three solar cycles. Comparison of the derived quantities with the A-index of the large-scale magnetic field suggests a positive answer to the question posed in the title of this paper.
description: 5 pages, 2 figures, to apper in Astronomy Letters
Equilibrium measures on trees
Creators: name: Arcozzi, Nicola
name: Levi, Matteo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary: 31C15. Secondary: 05C63, 05C05, 05B45, 52C20

description: We give a characterization of equilibrium measures for $p$-capacities on the boundary of an infinite tree of arbitrary (finite) local degree. For $p=2$, this provides, in the special case of trees, a converse to a theorem of Benjamini and Schramm, which interpretes the equilibrium measure of a planar graph's boundary in terms of square tilings of cylinders.
description: Major changes in the exposition, no changes in the results. Technical section on regularity of boundaries, of independent interest, removed to lighten the contents. 17 pages, 2 figure
Variational approximations for travelling solitons in a discrete nonlinear Schrödinger equation
Creators: name: Syafwan, M.
name: Susanto, H.
name: Cox, S. M.
name: Malomed, B. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Travelling solitary waves in the one-dimensional discrete nonlinear Schrödinger equation (DNLSE) with saturable onsite nonlinearity are studied. A variational approximation (VA) for the solitary waves is derived in an analytical form. The stability is also studied by means of the VA, demonstrating that the solitons are stable, which is consistent with previously published results. Then, the VA is applied to predict parameters of travelling solitons with non-oscillatory tails (\textit{embedded solitons}, ESs). Two-soliton bound states are considered too. The separation distance between the solitons forming the bound state is derived by means of the VA. A numerical scheme based on the discretization of the equation in the moving coordinate frame is derived and implemented using the Newton--Raphson method. In general, a good agreement between the analytical and numerical results is obtained. In particular, we demonstrate the relevance of the analytical prediction of characteristics of the embedded solitons.
description: This paper is to appear in Journal of Physics A
Dynamic MPLS with Feedback
Creators: name: Dumka, Ankur
name: Mandoria, Hardwari Lal
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Multiprotocol Label Switching (MPLS) fasten the speed of packet forwarding by forwarding the packets based on labels and reduces the use of routing table look up from all routers to label edge routers(LER), where as the label switch routers (LSRs) uses Label Distribution Protocol (LDP) or RSVP (Resource reservation Protocol) for label allocation and Label table for packet forwarding. Dynamic protocol is implemented which carries a Updates packets for the details of Label Switch Paths, along with this feedback mechanism is also introduced which find the shortest path among MPLS network and also feedback is provided which also help to overcome congestion, this feedback mechanism is on a hop by hop basis rather than end to end thus providing a more reliable and much faster and congestion free path for the packets.
description: 6 pages and 3 figures
Dissipative spin chain as a non-Hermitian Kitaev ladder
Creators: name: Shibata, Naoyuki
name: Katsura, Hosho
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive exact results for the Lindblad equation for a quantum spin chain (one-dimensional quantum compass model) with dephasing noise. The system possesses doubly degenerate nonequilibrium steady states due to the presence of a conserved charge commuting with the Hamiltonian and Lindblad operators. We show that the system can be mapped to a non-Hermitian Kitaev model on a two-leg ladder, which is solvable by representing the spins in terms of Majorana fermions. This allows us to study the Liouvillian gap, the inverse of relaxation time, in detail. We find that the Liouvillian gap increases monotonically when the dissipation strength $ γ$ is small, while it decreases monotonically for large $ γ$, implying a kind of phase transition in the first decay mode. The Liouvillian gap and the transition point are obtained in closed form in the case where the spin chain is critical. We also obtain the explicit expression for the autocorrelator of the edge spin. The result implies the suppression of decoherence when the spin chain is in the topological regime.
description: 11 pages, 5 figures. There are typos: $\gamma$ in Figs. 4 and 5 should read $r = 4 \gamma$
Real Paley-Wiener theorems in spaces of ultradifferentiable functions
Creators: name: Boiti, Chiara
name: Jornet, David
name: Oliaro, Alessandro
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We develop real Paley-Wiener theorems for classes ${\mathcal S}_ω$ of ultradifferentiable functions and related $L^{p}$-spaces in the spirit of Bang and Andersen for the Schwartz class. We introduce results of this type for the so-called Gabor transform and give a full characterization in terms of Fourier and Wigner transforms for several variables of a Paley-Wiener theorem in this general setting, which is new in the literature. We also analyze this type of results when the support of the function is not compact using polynomials. Some examples are given.
Cycles of Sums of Integers
Creators: name: Dular, Bruno
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A10, 11B50, 11B75

description: We study the period of the linear map $T:\mathbb{Z}_m^n\rightarrow \mathbb{Z}_m^n:(a_0,\dots,a_{n-1})\mapsto(a_0+a_1,\dots,a_{n-1}+a_0)$ as a function of $m$ and $n$, where $\mathbb{Z}_m$ stands for the ring of integers modulo $m$. Since this map is a variant of the Ducci sequence, several known results are adapted in the context of $T$. The main theorem of this paper states that the period modulo $m$ can be deduced from the prime factorization of $m$ and the periods of its prime factors. We also characterize the tuples that belong to a cycle when $m$ is prime.
About the nuclearity of ${\mathcal S}_{(M_{p})}$ and ${\mathcal S}_ω$
Creators: name: Boiti, Chiara
name: Jornet, David
name: Oliaro, Alessandro
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We use an isomorphism established by Langenbruch between some sequence spaces and weighted spaces of generalized functions to give sufficient conditions for the (Beurling type) space ${\mathcal S}_{(M_p)}$ to be nuclear. As a consequence, we obtain that for a weight function $ω$ satisfying the mild condition: $2ω(t)\leq ω(Ht)+H$ for some $H>1$ and for all $t\geq0$, the space ${\mathcal S}_ω$ in the sense of Björck is also nuclear.
A Kähler structure for the ${\rm PU}(2, 1)$ configuration space of four points in $S^3$
Creators: name: Platis, Ioannis D.
name: Sun, Li-Jie
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We show that an open subset ${\mathfrak F}_4''$ of the ${\rm PU}(2,1)$ configuration space of four points in $S^3$ is in bijection with an open subset of %with a Kähler structure which is inherited from the one of ${\mathfrak H}^{\star}\times\mathbb{R}_{>0}$, where ${\mathfrak H}^\star$ is the affine-rotational group. Since the latter is a Sasakian manifold, the cone ${\mathfrak H}^\star\times\mathbb{R}_{>0}$ is Kähler and thus ${\mathfrak F}_4''$ inherits this Kähler structure.
description: 21 pages
Direct Emission of Strong Radio Pulses During Magnetar Flares
Creators: name: Thompson, Christopher
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The emission of intense radio pulses by flaring magnetars is investigated. Small-scale current gradients can be imprinted into a strongly magnetized outflow by the same processes that source fireball radiation in the closed magnetosphere. This structure arises from a combination of crustal yielding, internal tearing, and turbulent cascade. We consider the quasi-linear development of weak, small-scale currents as (i) they are stretched out and frozen by relativistic expansion and then (ii) pass through a shock. In particular, we derive the amplitudes of the ordinary and fast waves that emerge downstream of a relativistically magnetized shock in response to a mode that is frozen into the upstream flow (a frozen Alfvén wave or entropy wave). An upstream mode with comoving wavelength exceeding the skin depth can linearly convert to a secondary mode propagating above the plasma frequency. A simple and accurate treatment of shocks with extreme magnetization is developed, and the formation of internal shocks in the outflow from a bursting, rotating magnetar is outlined. The emission process described here does not require a strong shock or cool $e^\pm$ pairs (in contrast with the electromagnetic maser shock instability). In some cases, a high-frequency wave is reflected back to the observer, but with a minuscule amplitude that makes it subdominant to other emission channels. The dominant secondary electromagnetic mode is superluminal at emission, is subject to weak induced scattering within the outflow, and can reach the observer in the radio band.
description: MNRAS in press, 24 pages, 4 figures. Expanded comparison with maser shock instability, treatment of MHD cascade in relativistic outflow
Time reversal symmetry in optics
Creators: name: Leuchs, Gerd
name: Sondermann, Markus
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The utilization of time reversal symmetry in designing and implementing (quantum) optical experiments has become more and more frequent over the past years. We review the basic idea underlying time reversal methods, illustrate it with several examples and discuss a number of implications.
description: 5 pages, 3 figures, typeset with revtex
Light stringy states and the $g-2$ of the muon
Creators: name: Anastasopoulos, Pascal
name: Niederwieser, Elias
name: Rondeau, François
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we evaluate the contributions to the anomalous magnetic moment of the muon ($(g-2)_μ$) coming from light stringy states in a D-brane semi-realistic configuration. A scalar which couples only to the muon can have a mass sufficiently light to provide a significant contribution to the $(g-2)_μ$. This scenario can arise in intersecting D-brane models, where such light scalars correspond to the first stringy excitations of an open string stretched between two D-branes intersecting with a very small angle. In this article, we show that there is a region in the space of the geometric parameters of the internal manifold where such scalar light stringy states can explain (part) of the observed discrepancy in the $(g-2)_μ$. In a low string scale framework with $M_s\sim 10~{\rm TeV}$, we show that an excited Higgs with mass $\mathcal{O}(250~{\rm MeV})$, living in an intersection with an angle of order $\mathcal{O}(10^{-10})$, can provide a significant contribution of one-tenth of the $(g-2)_μ$ discrepancy. This leads to a lower bound for the compact dimension where the branes intersect of order $\mathcal{O}(10^{-8}~{\rm GeV}^{-1})$. We also study patterns in D-brane configurations that realize our proposal, both in three and four stacks models.
description: 26 pages, 9 figures. Published version
Improving Seek Time for Column Store Using MMH Algorithm
Creators: name: Apte, Tejaswini
name: Ingle, Dr. Maya
name: Goyal, Dr. A. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Databases (cs.DB)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Hash based search has, proven excellence on large data warehouses stored in column store. Data distribution has significant impact on hash based search. To reduce impact of data distribution, we have proposed Memory Managed Hash (MMH) algorithm that uses shift XOR group for Queries and Transactions in column store. Our experiments show that MMH improves read and write throughput by 22% for TPC-H distribution.
Empirical Process Results for Exchangeable Arrays
Creators: name: Davezies, Laurent
name: D'Haultfoeuille, Xavier
name: Guyonvarch, Yannick
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistics Theory (math.ST)
subject: Econometrics (econ.EM)
subject: FOS: Mathematics
subject: FOS: Economics and business

description: Exchangeable arrays are natural tools to model common forms of dependence between units of a sample. Jointly exchangeable arrays are well suited to dyadic data, where observed random variables are indexed by two units from the same population. Examples include trade flows between countries or relationships in a network. Separately exchangeable arrays are well suited to multiway clustering, where units sharing the same cluster (e.g. geographical areas or sectors of activity when considering individual wages) may be dependent in an unrestricted way. We prove uniform laws of large numbers and central limit theorems for such exchangeable arrays. We obtain these results under the same moment restrictions and conditions on the class of functions as those typically assumed with i.i.d. data. We also show the convergence of bootstrap processes adapted to such arrays.
description: main paper until page 23, then supplement. The paper supersedes our previous paper "Asymptotic results under multiway clustering"
Formation versus destruction: the evolution of the star cluster population in galaxy mergers
Creators: name: Kruijssen, J. M. Diederik
name: Pelupessy, F. Inti
name: Lamers, Henny J. G. L. M.
name: Zwart, Simon F. Portegies
name: Bastian, Nate
name: Icke, Vincent
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: (Abridged) Interacting galaxies are well-known for their high star formation rates and rich star cluster populations, but the rapidly changing tidal field can also efficiently destroy clusters. We use numerical simulations of merging disc galaxies to investigate which mechanism dominates. The simulations include a model for the formation and dynamical disruption of the entire star cluster population. We find that the dynamical heating of clusters by tidal shocks is about an order of magnitude higher in interacting galaxies than in isolated galaxies. This is driven by the increased gas density, and is sufficient to destroy star clusters at a higher rate than new clusters are formed: the total number of clusters in the merger remnant is 2-50% of the amount in the progenitor discs, with low-mass clusters being disrupted preferentially. By adopting observationally motivated selection criteria, we find that the observed surplus of star clusters in nearby merging galaxies is caused by the bias to detect young, massive clusters. We provide a general expression for the survival fraction of clusters, which increases with the gas depletion time-scale. Due to the preferential disruption of low-mass clusters, the mass distribution of the surviving star clusters in a merger remnant develops a peak at a mass of about 10^3 Msun, which evolves to higher masses at a rate of 0.3-0.4 dex per Gyr. The peak mass initially depends weakly on the galactocentric radius, but this correlation disappears as the system ages. We discuss the similarities between the cluster populations of the simulated merger remnants and (young) globular cluster systems. Our results suggest that the combination of cluster formation and destruction should be widespread in the dense star-forming environments at high redshifts, which could provide a natural origin to present-day globular cluster systems.
description: 15 pages, 9 figures, 2 tables; Accepted for publication in MNRAS. A movie of the full time sequence in Figure 1 can be found at http://www.mpa-garching.mpg.de/~diederik/1m11clusters.html
Controlling a resonant transmission across the $δ'$-potential: the inverse problem
Creators: name: Zolotaryuk, A. V.
name: Zolotaryuk, Y.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 17D20, 47A52, 15A29, 81Q05, 47B37

description: Recently, the non-zero transmission of a quantum particle through the one-dimensional singular potential given in the form of the derivative of Dirac's delta function, $λδ'(x) $, with $λ\in \R$, being a potential strength constant, has been discussed by several authors. The transmission occurs at certain discrete values of $λ$ forming a resonance set ${λ_n}_{n=1}^\infty$. For $λ\notin {λ_n}_{n=1}^\infty$ this potential has been shown to be a perfectly reflecting wall. However, this resonant transmission takes place only in the case when the regularization of the distribution $δ'(x) $ is constructed in a specific way. Otherwise, the $δ'$-potential is fully non-transparent. Moreover, when the transmission is non-zero, the structure of a resonant set depends on a regularizing sequence $Δ'_\varepsilon(x)$ that tends to $δ'(x)$ in the sense of distributions as $\varepsilon \to 0$. Therefore, from a practical point of view, it would be interesting to have an inverse solution, i.e. for a given $\barλ \in \R$ to construct such a regularizing sequence $Δ'_\varepsilon(x)$ that the $δ'$-potential at this value is transparent. If such a procedure is possible, then this value $\barλ$ has to belong to a corresponding resonance set. The present paper is devoted to solving this problem and, as a result, the family of regularizing sequences is constructed by tuning adjustable parameters in the equations that provide a resonance transmission across the $δ'$-potential.
description: 21 pages, 4 figures. Corrections to the published version added; http://iopscience.iop.org/1751-8121/44/37/375305
Symplectic circuits, entanglement, and stimulated Hawking radiation in analog gravity
Creators: name: Brady, Anthony J.
name: Agullo, Ivan
name: Kranas, Dimitrios
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a convenient set of analytical tools (the Gaussian formalism) and diagrams (symplectic circuits) to analyze multi-mode scattering events in analog gravity, such as pair-creation a lá Hawking by black hole and white hole analog event horizons. The diagrams prove to be valuable ansatzes for the scattering dynamics, especially in settings where direct analytic results are not straightforward and one must instead rely on numerical simulations. We use these tools to investigate entanglement generation in single- and multi-horizon scenarios, in particular when the Hawking process is stimulated with classical (e.g., thermal noise) and non-classical (e.g., single-mode squeezed vacuum) input states -- demonstrating, for instance, that initial squeezing can enhance the production of entanglement and overcome the deleterious effects that initial thermal fluctuations have on the output entanglement. To make further contact with practical matters, we examine how attenuation degrades quantum correlations between Hawking pairs. The techniques that we employ are generally applicable to analog gravity setups of (Gaussian) bosonic quantum systems, such as analog horizons produced in optical analogs and in Bose-Einstein condensates, and should be of great utility in these domains. We show the applicability of these techniques by putting them in action for an optical system containing a pair white-black hole analog, extending our previous analysis of [Phys. Rev. Lett. 128, 091301 (2022)].
description: 25 + 10 pages and 21 figures. Comments welcome
Mahler measures of a family of non-tempered polynomials and Boyd's conjectures
Creators: name: Meemark, Yotsanan
name: Samart, Detchat
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11R06, Secondary 11F67, 11G05, 11G16, 19F27, 33C75, 33E05

description: We prove an identity relating Mahler measures of a certain family of non-tempered polynomials to those of tempered polynomials. Evaluations of Mahler measures of some polynomials in the first family are also given in terms of special values of $L$-functions and logarithms. Finally, we prove Boyd's conjectures for conductor $30$ elliptic curves using our new identity, Brunault-Mellit-Zudilin's formula and additional functional identities for Mahler measures.
description: 21 pages
Signatures of orbital loop currents in the spatially resolved local density of states
Creators: name: Nielsen, W. H. P.
name: Atkinson, W. A.
name: Andersen, B. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Polarized neutron scattering measurements have suggested that intra-unit cell antiferromagnetism may be associated with the pseudogap phase. Assuming that loop current order is responsible for the observed magnetism, we calculate some signatures of such circulating currents in the local density of states around a single non-magnetic impurity in a coexistence phase with superconductivity. We find a distinct C4 symmetry breaking near the disorder which is also detectable in the resulting quasi-particle interference patterns.
description: 5 pages, 3 figures
About Information Sources in Aeschylus’ Agamemnon and Choephori
Creators: name: Cesca, Ombretta
Publisher: name: Skenè. Journal of Theatre and Drama Studies
Year: 2019

description: This paper investigates the topics of information and information sources in Aeschylus’ Agamemnon and Choephori. The emphasis placed by the author on these issues is clearly noticeable from the beginning of the Agamemnon in the famous scene of the relay of beacons. A comparison with the Odyssey (4.514-37) suggests that communication through beacons is an Aeschylean invention, one specifically adopted in this version of the myth of Agamemnon’s return. The beacon scene constitutes an initial opportunity for Aeschylus to engage in a large-scale reflection about information sources and their degree of reliability. Throughout the play, the beacon system is put in relation to news, verbal reports, ominous dreams, and rumours. The characters’ assessment of the reliability of different information sources plays an important role in their characterization, notably in the cases of Clytemnestra and Cassandra. Nevertheless, many differences can be found between the Agamemnon and the Choephori concerning the treatment of this topic. A comparative reading of the two plays allows Aeschylus’ reflection on the human condition emerge more vividly.
description: Skenè. Journal of Theatre and Drama Studies, Vol. 3 No. 1 (2017)
An Early Catalog of Planet Hosting Multiple Star Systems of Order Three and Higher
Creators: name: Cuntz, M.
name: Luke, G. E.
name: Millard, M. J.
name: Boyle, L.
name: Patel, S. D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present a catalog (status July 1, 2022) of triple and higher order systems identified containing exoplanets based on data from the literature, including various analyses. We explore statistical properties of the systems with focus on both the stars and the planets. So far, about 30 triple systems and one to three quadruple systems, including (mildly) controversial cases, have been found. The total number of planets is close to 40. All planet-hosting triple star systems are highly hierarchic, consisting of a quasi-binary complemented by a distant stellar component, which is in orbit about the common center of mass. Furthermore, the quadruple systems are in fact pairs of close binaries (``double-doubles"), with one binary harboring a planet. For the different types of star-planet systems, we introduce a template for the classifications of planetary orbital configurations in correspondence to the hierarchy of the system and the planetary host. The data show that almost all stars are main-sequence stars, as expected. However, the stellar primaries tend to be more massive (i.e., corresponding to spectral types A, F, and G) than expected from single star statistics, a finding also valid for stellar secondaries but less pronounced. Tertiary stellar components are almost exclusively low-mass stars of spectral type M. Almost all planets have been discovered based on either the Radial Velocity or the Transit method. Both gas giants (the dominant type) and terrestrial planets (including super-Earths) have been identified. We anticipate the expansion of this data base in the light of future planetary search missions.
description: Accepted by ApJS; 59 pages, including 11 figures and 12 tables
Spectral walls in antikink-kink scattering in the $ϕ^6$ model
Creators: name: Adam, C.
name: Oles, K.
name: Romanczukiewicz, T.
name: Wereszczynski, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We show that thick spectral walls exist in antikink-kink collisions in the $ϕ^6$ model. In this model, they are triggered by the so-called $delocalized$ $modes$ which do not exist in the single-soliton sector but emerge in antikink-kink ($\bar{K}K$) collisions. Therefore, spectral walls are a rather common phenomenon that should occur in many solitonic collisions involving non-symmetric kinks as, e.g., in the $ϕ^8$ or higher power models.
description: 6 pages, 4 figures
Revisited functional renormalization group approach for random matrices in the large-$N$ limit
Creators: name: Lahoche, Vincent
name: Samary, Dine Ousmane
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The nonperturbative renormalization group has been considered as a solid framework to investigate fixed point and critical exponents for matrix and tensor models, expected to correspond with the so-called double scaling limit. In this paper, we focus on matrix models and address the question of the compatibility between the approximations used to solve the exact renormalization group equation and the modified Ward identities coming from the regulator. We show in particular that standard local potential approximation strongly violates the Ward identities, especially in the vicinity of the interacting fixed point. Extending the theory space including derivative couplings, we recover an interacting fixed point with a critical exponent not so far from the exact result, but with a nonzero value for derivative couplings, evoking a strong dependence concerning the regulator. Finally, we consider a modified regulator, allowing to keep the flow not so far from the ultralocal region and recover the results of the literature up to a slight improvement.
description: 21 pages 9 figures. Minor modification: we changed figure 4 and remark 1
The remnant of SN1987A revealed at (sub-)mm wavelengths
Creators: name: Lakicevic, Masha
name: van Loon, Jacco Th.
name: Patat, Ferdinando
name: Staveley-Smith, Lister
name: Zanardo, Giovanna
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: Supernova 1987A (SN1987A) exploded in the Large Magellanic Cloud (LMC). Its proximity and rapid evolution makes it a unique case study of the early phases in the development of a supernova remnant. One particular aspect of interest is the possible formation of dust in SN1987A, as SNe could contribute significantly to the dust seen at high redshifts. Aims: We explore the properties of SN1987A and its circumburst medium as seen at mm and sub-mm wavelengths, bridging the gap between extant radio and infrared (IR) observations of respectively the synchrotron and dust emission. Methods: SN1987A was observed with the Australia Telescope Compact Array (ATCA) at 3.2 mm in July 2005, and with the Atacama Pathfinder EXperiment (APEX) at 0.87 mm in May 2007. We present the images and brightness measurements of SN1987A at these wavelengths for the first time. Results: SN1987A is detected as an unresolved point source of 11.2 +/- 2.0 mJy at 3.2 mm (5" beam) and 21 +/- 4 mJy at 0.87 mm (18" beam). These flux densities are in perfect agreement with extrapolations of the powerlaw radio spectrum and modified-blackbody dust emission, respectively. This places limits on the presence of free-free emission, which is similar to the expected free-free emission from the ionized ejecta from SN1987A. Adjacent, fainter emission is observed at 0.87 mm extending ~0.5' towards the south-west. This could be the impact of the supernova progenitor's wind when it was still a red supergiant upon a dense medium. Conclusions: We have established a continuous spectral energy distribution for the emission from SN1987A and its immediate surroundings, linking the IR and radio data. This places limits on the contribution from ionized plasma. Our sub-mm image reveals complexity in the distribution of cold dust surrounding SN1987A, but leaves room for freshly synthesized dust in the SN ejecta.
description: Accepted for publication in Astronomy and Astrophysics Letters on 28 April 2011. A better quality figure 1 can be had from http://www.astro.keele.ac.uk/~jacco/research/SN1987A087mm.eps
Threshold photoproduction of neutral pions off protons in nuclear model with explicit mesons
Creators: name: Fedorov, D. V.
name: Mikkelsen, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We apply the nuclear model with explicit mesons to photoproduction of neutral pions off protons at the threshold. In this model the nucleons do not interact with each other via a potential but rather emit and absorb mesons that are treated explicitly on equal footing with the nucleons. We calculate the total cross section of the reaction for energies close to threshold and compare the calculations with available experimental data. We show that the model is able to reproduce the experimental data and determine the range of the parameters where the model is compatible with the experiment.
Sampling, Marcinkiewicz-Zygmund Inequalities, Approximation, and Quadrature Rules
Creators: name: Gröchenig, Karlheinz
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 41A17, 42A10, 65D30

description: Given a sequence of Marcinkiewicz-Zygmund inequalities in $L^2$, we derive approximation theorems and quadrature rules. The derivation is completely elementary and requires only the definition of Marcinkiewicz-Zygmund inequality, Sobolev spaces, and the solution of least square problems.
A new transfer technique for high mobility graphene devices on commercially available hexagonal boron nitride
Creators: name: Zomer, P. J.
name: Dash, S. P.
name: Tombros, N.
name: van Wees, B. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present electronic transport measurements of single- and bilayer graphene on commercially available hexagonal boron nitride. We extract mobilities as high as 125 000 cm^2/V/s at room temperature and 275 000 cm^2/V/s at 4.2 K. The excellent quality is supported by the early development of the nu = 1 quantum Hall plateau at a magnetic field of 5 T and temperature of 4.2 K. We also present a new and accurate transfer technique of graphene to hexagonal boron nitride crystals. This technique is simple, fast and yields atomically flat graphene on boron nitride which is almost completely free of bubbles or wrinkles. The potential of commercially available boron nitride combined with our transfer technique makes high mobility graphene devices more accessible.
description: 3 pages, 3 figures
High temperature AdS black holes are low temperature quantum phonon gases
Creators: name: Kong, Xiangqing
name: Wang, Tao
name: Zhao, Liu
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Gases (cond-mat.quant-gas)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We report a precise match between the high temperature $(D+2)$-dimensional Tangherlini-AdS black hole and the low temperature quantum phonon gas in $D$-dimensional nonmetallic crystals residing in $(D+1)$-dimensional flat spacetime. The match is realized by use of the recently proposed restricted phase space formalism for black hole thermodynamics, and the result can be viewed as a novel contribution to the AdS/CMT correspondence on a quantitative level.
description: 11 pages. v3: version published in PLB
The quantum phase of a dyon
Creators: name: Heras, Ricardo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: When a dyon encircles an infinitely-long solenoid enclosing uniform electric and magnetic fields, its wave function accumulates a duality-invariant quantum phase, which is topological because it depends on a winding number and is nonlocal because the enclosed fields act on the dyon in regions where these fields vanish. Here, we derive this dyon phase and show how its duality symmetry unifies the Aharonov-Bohm phase with its dual phase. We obtain the energy levels, the two-slit interference shift, and the scattering amplitude associated with the duality-invariant quantum phase. Assuming that the dyon has spin 1/2, we show that this spin does not affect the introduced phase. We argue that a spin 1/2 dyon has electric and magnetic moments, the former being greater than the latter because of the Schwinger-Zwanziger quantisation condition.
description: v3. Published in The European Physical Journal Plus
RetiFluidNet: A Self-Adaptive and Multi-Attention Deep Convolutional Network for Retinal OCT Fluid Segmentation
Creators: name: Rasti, Reza
name: Biglari, Armin
name: Rezapourian, Mohammad
name: Yang, Ziyun
name: Farsiu, Sina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Optical coherence tomography (OCT) helps ophthalmologists assess macular edema, accumulation of fluids, and lesions at microscopic resolution. Quantification of retinal fluids is necessary for OCT-guided treatment management, which relies on a precise image segmentation step. As manual analysis of retinal fluids is a time-consuming, subjective, and error-prone task, there is increasing demand for fast and robust automatic solutions. In this study, a new convolutional neural architecture named RetiFluidNet is proposed for multi-class retinal fluid segmentation. The model benefits from hierarchical representation learning of textural, contextual, and edge features using a new self-adaptive dual-attention (SDA) module, multiple self-adaptive attention-based skip connections (SASC), and a novel multi-scale deep self supervision learning (DSL) scheme. The attention mechanism in the proposed SDA module enables the model to automatically extract deformation-aware representations at different levels, and the introduced SASC paths further consider spatial-channel interdependencies for concatenation of counterpart encoder and decoder units, which improve representational capability. RetiFluidNet is also optimized using a joint loss function comprising a weighted version of dice overlap and edge-preserved connectivity-based losses, where several hierarchical stages of multi-scale local losses are integrated into the optimization process. The model is validated based on three publicly available datasets: RETOUCH, OPTIMA, and DUKE, with comparisons against several baselines. Experimental results on the datasets prove the effectiveness of the proposed model in retinal OCT fluid segmentation and reveal that the suggested method is more effective than existing state-of-the-art fluid segmentation algorithms in adapting to retinal OCT scans recorded by various image scanning instruments.
description: 11 pages, Early Access Version, IEEE Transactions on Medical Imaging
Momentum transfer in the dark sector and lensing convergence in upcoming galaxy surveys
Creators: name: Cardona, Wilmar
name: Figueruelo, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigated a cosmological model that allows a momentum transfer between dark matter and dark energy. The interaction in the dark sector mainly affects the behaviour of perturbations on small scales while the background evolution matches the $w$CDM solution. As a result of the momentum transfer, these kinds of models help alleviating the $σ_8$ discrepancy in the standard model, but do not resolve the so-called $H_0$ tension. We confirm that this is indeed the case by computing cosmological constraints. While our analysis tends to favour $σ_8$ values lower than in $Λ$CDM, we do not find evidence for a non-vanishing momentum transfer in the dark sector. Since upcoming galaxy surveys will deliver information on scales and red-shift relevant for testing models allowing momentum transfer in the dark sector, we also carried out forecasts using different survey configurations. We assessed the relevance of neglecting lensing convergence $κ$ when modelling the angular power spectrum of number counts fluctuations $C_\ell^{\rm ij}(z,z')$. We found that not including $κ$ in analyses leads to biased constraints ($\approx 1-5\,σ$) of cosmological parameters even when including information from other experiments. Incorrectly modelling $C_\ell^{\rm ij}(z,z')$ might lead to spurious detection of neutrino masses and exacerbate discrepancies in $H_0$ and $σ_8$.
description: 26 pages, 8 figures, 8 tables. Comments welcome Updated version. Matches published version