cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
New energy-capacity-type inequalities and uniqueness of continuous Hamiltonians
Creators: name: Humilière, Vincent
name: Leclercq, Rémi
name: Seyfaddini, Sobhan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We prove a new variant of the energy-capacity inequality for closed rational symplectic manifolds (as well as certain open manifolds such as cotangent bundle of closed manifolds...) and we derive some consequences to C^0-symplectic topology. Namely, we prove that a continuous function which is a uniform limit of smooth Hamiltonians whose flows converge to the identity for the spectral (or Hofer's) distance must vanish. This gives a new proof of uniqueness of continuous generating Hamiltonian for hameomorphisms. This also allows us to improve a result by Cardin and Viterbo on the C^0-rigidity of the Poisson bracket.
description: 18 pages. v2. Several minor changes. Reference list updated. To appear in Commentarii Mathematici Helvetici
Scalar Casimir effects in a Lorentz violation scenario induced by the presence of constant vectors
Creators: name: de Mello, E. R. Bezerra
name: Cruz, M. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we consider a theoretical model that presents violation of the Lorentz symmetry in the approach of Quantum Field Theory. The theoretical model adopted consists of a real massive scalar quantum field confined in the region between two large parallel plates. The Lorentz symmetry violation is introduced by CPT-even, aether-like approach, considering a direct coupling between the derivative of the the scalar field with two orthogonal constant vectors. The main objective of this paper is to analyze the modification on the Casimir energy and pressure caused by the anisotropy of the space-time as consequence of these couplings. The confinement of the scalar quantum field between the plates is implemented by the imposition boundaries conditions on them.
description: 19 pages. 3 figures. Version accepted for publication in IJMPA
The mean curvature flow for invariant hypersurfaces in a Hilbert space with an almost free group action
Creators: name: Koike, Naoyuki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper, we study the regularized mean curvature flow starting from invariant hypersurfaces in a Hilbert space equipped with an isometric almost free Hilbert Lie group action whose orbits are minimal regularizable submanifolds, where "almost free" means that the stabilizers of the group action are finite. First we obtain the evolution equations for some geometric quantities along the regularized mean curvature flow. Next, by using the evolution equations, we prove a horizontally strongly convexity preservability theorem for the regularized mean curvature flow. From this theorem, we derive the strongly convexity preservability theorem for the mean curvature flow starting from compact Riemannian suborbifolds in the orbit space (which is a Riemannian orbifold) of the Hilbert Lie group action.
description: 35 pages
Wavepacket detection with the Unruh-DeWitt model
Creators: name: Martin-Martinez, Eduardo
name: Montero, Miguel
name: del Rey, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we deal with several issues regarding the localization properties of the Unruh-DeWitt (UdW) detector model. Since its original formulation as a pointlike detector, the UdW model has been used to study extensively the physics of quantum fields in presence of accelerations or curved backgrounds. Natural extensions of it have tried to take into account the spatial profile of such detectors, but all of them have met a series of problems in their spectral response which render them useless to study some of the most interesting physical scenarios. In this paper we provide a derivation of the smeared UdW interaction from QED first principles, then we analyze the spectral response of spatially smeared UdW detectors, and discuss the kind of spatial profiles which are useful for the study of relevant cases.
description: 7 pages, 3 figures
Holographic RG flows in six dimensional F(4) gauged supergravity
Creators: name: Karndumri, Parinya
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study critical points of $F(4)$ gauged supergravity in six dimensions coupled to three vector multiplets. Scalar fields are described by $\mathbb{R}^+\times \frac{SO(4,3)}{SO(4)\times SO(3)}$ coset space, and the gauge group is given by $SO(3)_R\times SO(3)$ with $SO(3)_R$ being the R-symmetry. The maximally supersymmetric critical point with all scalars vanishing preserves the full $SO(3)_R\times SO(3)$ symmetry. This is dual to a superconformal field theories (SCFT$_5$) arising from a near horizon geometry of the D4-D8 brane system in type I$'$ theory with an enhanced global symmetry $E_1\sim SU(2)$. Apart from this trivial critical point, we identify a new supersymmetric critical point preserving the full supersymmetry with the $SO(3)_R\times SO(3)$ symmetry broken to its diagonal subgroup. This critical point should correspond to a new SCFT in five dimensions. We study an RG flow solution interpolating between the SCFT with $E_1$ symmetry and the new supersymmetric critical point. The flow describes a supersymmetric deformation driven by a vacuum expectation value of relevant operators of dimension $3$. We identify the dual operators with the mass terms for hypermultiplet scalars in the dual field theory. The solution provides an example of analytic supersymmetric RG flows in AdS$_6$/CFT$_5$ correspondence.
description: 21 pages, 1 figure, typos corrected, some changes due to the discovery of hep-th/0203124 added, an error in the supersymmetry of the AdS6 critical point corrected, an analytic RG flow solution given, all of the results consistent with JHEP erratum
Death at watersheds: galaxy quenching in low-density environments
Creators: name: Einasto, Maret
name: Kipper, Rain
name: Tenjes, Peeter
name: Einasto, Jaan
name: Tempel, Elmo
name: Liivamägi, Lauri Juhan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Our aim is to understand the effect of environment to galaxy quenching in various local and global environments. We focus on galaxies with very old stellar populations (VO galaxies), typically found in the centers of clusters and groups, and search for such galaxies in the lowest global density environments, watersheds between superclusters. We use the Sloan Digital Sky Survey MAIN galaxy sample to calculate the luminosity-density field and get global density field, to determine groups and filaments, and to obtain data on galaxy properties. We divide groups into low- and high-luminosity groups based on the highest luminosity of groups in the watershed region, $L_{gr} = 15 \times10^{10} h^{-2} L_{sun}$. Our study shows that the global density is most strongly related to the richness of galaxy groups. Its influence on the overall star formation quenching in galaxies is less strong. Correlations between the morphological properties of galaxies and the global density field are the weakest. The watershed regions are populated mostly by single galaxies (70% of all galaxies there), and by low-luminosity groups. Still, approximately one-third of all galaxies in the watershed regions are VO galaxies. They have lower stellar masses, smaller stellar velocity dispersions, and stellar populations that are up to 2Gyr younger than those of VO galaxies in other global environments. In higher density global environments, the morphological properties of galaxies are very similar. Differences in galaxy properties are the largest between satellites and brightest group galaxies. Our results suggest that galaxy evolution is determined by the birthplace of galaxies in the cosmic web, and mainly by internal processes which lead to the present-day properties of galaxies. This may explain the similarity of (VO) galaxies in extremely different environments.
description: 21 pages, 14 figures. A&A, 668, A69, 2022, typos corrected
Cosmological evolution, future singularities, Little Rip and Pseudo-Rip in viable f(R) theories and their scalar-tensor counterpart
Creators: name: Sáez-Gómez, Diego
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Modified f(R) gravity is one of the most promising candidates for dark energy, and even for the unification of the whole cosmological evolution, including the inflationary phase. Within this class of theories, the so-called viable modified gravities represent realistic theories that are capable of reproducing late-time acceleration, and satisfy strong constraints at local scales, where General Relativity is recovered. The present manuscript deals with the analysis of the cosmological evolution for some of these models, which indicates that the evolution may enter into a phantom phase, but the behavior may be asymptotically stable. Furthermore, the scalar-tensor equivalence of f(R) gravity is considered, which provides useful information about the possibility of the occurrence of a future singularity. The so-called Little Rip and Pseudo-Rip are also studied in the framework of this class of modified gravities.
description: 20 pages. Extended version, new figures and additional analysis. Version to be published in Class. Quant. Grav
A proposal to probe quantum non-locality of Majorana fermions in tunneling experiments
Creators: name: Sau, Jay D.
name: Swingle, Brian
name: Tewari, Sumanta
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Topological Majorana fermion (MF) quasiparticles have been recently suggested to exist in semiconductor quantum wires with proximity induced superconductivity and a Zeeman field. Although the experimentally observed zero bias tunneling peak and a fractional ac-Josephson effect can be taken as necessary signatures of MFs, neither of them constitutes a sufficient "smoking gun" experiment. Since one pair of Majorana fermions share a single conventional fermionic degree of freedom, MFs are in a sense fractionalized excitations. Based on this fractionalization we propose a tunneling experiment that furnishes a nearly unique signature of end state MFs in semiconductor quantum wires. In particular, we show that a "teleportation"-like experiment is not enough to distinguish MFs from pairs of MFs, which are equivalent to conventional zero energy states, but our proposed tunneling experiment, in principle, can make this distinction.
description: Simplified proposal with expanded results in this version; 5 pages, 2 figures + Supplementary material
Towards Better Guided Attention and Human Knowledge Insertion in Deep Convolutional Neural Networks
Creators: name: Gupta, Ankit
name: Sintorn, Ida-Maria
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Attention Branch Networks (ABNs) have been shown to simultaneously provide visual explanation and improve the performance of deep convolutional neural networks (CNNs). In this work, we introduce Multi-Scale Attention Branch Networks (MSABN), which enhance the resolution of the generated attention maps, and improve the performance. We evaluate MSABN on benchmark image recognition and fine-grained recognition datasets where we observe MSABN outperforms ABN and baseline models. We also introduce a new data augmentation strategy utilizing the attention maps to incorporate human knowledge in the form of bounding box annotations of the objects of interest. We show that even with a limited number of edited samples, a significant performance gain can be achieved with this strategy.
Rho-classes, index theory and Stolz' positive scalar curvature sequence
Creators: name: Piazza, Paolo
name: Schick, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: K-Theory and Homology (math.KT)
subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In this paper, we study the space of metrics of positive scalar curvature using methods from coarse geometry. Given a closed spin manifold M with fundamental group G, Stephan Stolz introduced the positive scalar curvature exact sequence, in analogy to the surgery exact sequence in topology. It calculates a structure group of metrics of positive scalar curvature on M (the object we want to understand) in terms of spin-bordism of BG and a somewhat mysterious group R(G). Higson and Roe introduced a K-theory exact sequence in coarse geometry which contains the Baum-Connes assembly map, with one crucial term K(D*G) canonically associated to G. The K-theory groups in question are the home of interesting index invariants and secondary invariants, in particular the rho-class in K_*(D*G) of a metric of positive scalar curvature on a spin manifold. One of our main results is the construction of a map from the Stolz exact sequence to the Higson-Roe exact sequence (commuting with all arrows), using coarse index theory throughout. Our main tool are two index theorems, which we believe to be of independent interest. The first is an index theorem of Atiyah-Patodi-Singer type. Here, assume that Y is a compact spin manifold with boundary, with a Riemannian metric g which is of positive scalar curvature when restricted to the boundary (and with fundamental group G). Because the Dirac operator on the boundary is invertible, one constructs a delocalized APS-index in K_* (D*G). We then show that this class equals the rho-class of the boundary. The second theorem equates a partitioned manifold rho-class of a positive scalar curvature metric to the rho-class of the partitioning hypersurface.
description: 39 pages. v2: final version, to appear in Journal of Topology. Added more details and restructured the proofs, correction of a couple of errors. v3: correction after final publication of a (minor) technical glitch in the definition of the rho-invariant on p6. The JTop version is not corrected
Gabriele B. Clemens, Eva Kell (Hg.), Preußen an der Saar. Eine konfliktreiche Beziehung (1815–1914), Saarbrücken (Kommission für Saarländische Landesgeschichte) 2018
Creators: name: Kerautret, Michel
Publisher: name: Francia-Recensio
Year: 2019

description: Gabriele B. Clemens, Eva Kell (Hg.), Preußen an der Saar. Eine konfliktreiche Beziehung (1815–1914), Saarbrücken (Kommission für Saarländische Landesgeschichte) 2018, 295 S. (Veröffentlichungen der Kommission für Saarländische Landesgeschichte, 50), ISBN 978-3-939150-11-4, EUR 19,80.
description: Francia-Recensio, 2019/3
Lorentz completion of effective string (and p-brane) action
Creators: name: Gliozzi, Ferdinando
name: Meineri, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The formation of a confining string (or a p-brane) in a Poincare' invariant theory breaks spontaneously this symmetry which is thereby realized non-linearly in the effective action of these extended objects. As a consequence the form of the action is strongly constrained. A new general method is described to obtain in a systematic way higher order Lorentz invariant contributions to this action. We find a simple recipe to promote a term invariant under the stability subgroup to an expression invariant under the whole Lorentz group. It is based on the following three steps: in the saturation of worldsheet (or worldvolume) indices replace the Minkowski metric with the inverse of the induced metric; in the saturation of indices of the transverse coordinates describing the position of the extended object replace the Euclidean metric with a certain new metric; finally replace the field derivatives of order higher than two with a certain covariant derivative. Lorentz invariance of the expression modified this way immediately follows. We find in particular that the leading bulk deviation of the Nambu Goto action in any space-time dimensions is proportional to the square of scalar curvature.
description: 17 pages, 8 figures. v2: typos corrected. A note had been added discussing the geometric interpretation of higher order Lorentz invariant contributions to the effective string action
Andreas Johannes, Das Feld der Großmächte im 18. Jahrhundert. Eine soziologische Analyse am Beispiel des Aufstiegs Preußens zur Großmacht (1740–1763), Baden-Baden (Nomos) 2017
Creators: name: Hahn, Peter
Publisher: name: Francia-Recensio
Year: 2019

description: Andreas Johannes, Das Feld der Großmächte im 18. Jahrhundert. Eine soziologische Analyse am Beispiel des Aufstiegs Preußens zur Großmacht (1740–1763), Baden-Baden (Nomos) 2017, 373 S. (Nomos Universitätsschriften Soziologie, 18), ISBN 978-3-8487-3194-7, EUR 69,00.
description: Francia-Recensio, 2019/3
Sylvester sums on the Frobenius set in arithmetic progression with initial gaps
Creators: name: Komatsu, Takao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let $a_1,a_2,\dots,a_k$ be positive integers with $\gcd(a_1,a_2,\dots,a_k)=1$. Frobenius number is the largest positive integer that is NOT representable in terms of $a_1,a_2,\dots,a_k$. When $k\ge 3$, there is no explicit formula in general, but some formulae may exist for special sequences $a_1,a_2,\dots,a_k$, including, those forming arithmetic progressions and their modifications. In this paper we give explicit formulae for the sum of nonrepresentable positive integers (Sylvester sum) as well as Frobenius numbers and the number of nonrepresentable positive integers (Sylverster number) for $a_1,a_2,\dots,a_k$ forming arithmetic progressions with initial gaps.
Julien Puget, Les embellissements d’Aix et de Marseille. Droits, espace et fabrique de la ville aux XVIIe et XVIIIe siècles, Rennes (Presses universitaires de Rennes) 2018
Creators: name: Busch, Thorsten
Publisher: name: Francia-Recensio
Year: 2019

description: Julien Puget, Les embellissements d’Aix et de Marseille. Droits, espace et fabrique de la ville aux XVIIe et XVIIIe siècles, Rennes (Presses universitaires de Rennes) 2018, 370 p. (Histoire), ISBN 978-2-7535-6520-3, EUR 25,00.
description: Francia-Recensio, 2019/3
Johann Chapoutot, Christian Ingrao, Hitler, Paris (Presses universitaires de France) 2018
Creators: name: Von List, Corinna
Publisher: name: Francia-Recensio
Year: 2019

description: Johann Chapoutot, Christian Ingrao, Hitler, Paris (Presses universitaires de France) 2018, 213 p. (Biographies), ISBN 978-2-13-080029-3, EUR 13,00.
description: Francia-Recensio, 2019/3
Some classes of renormalizable tensor models
Creators: name: Geloun, Joseph Ben
name: Livine, Etera R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We identify new families of renormalizable of tensor models from anterior renormalizable tensor models via a mapping capable of reducing or increasing the rank of the theory without having an effect on the renormalizability property. Mainly, a version of the rank 3 tensor model as defined in [arXiv:1201.0176 [hep-th]], the Grosse-Wulkenhaar model in 4D and 2D generate three different classes of renormalizable models. The proof of the renormalizability is fully performed for the first reduced model. The same procedure can be applied for the remaining cases. Interestingly, we find that, due to the peculiar behavior of anisotropic wave function renormalizations, the rank 3 tensor model reduced to a matrix model generates a simple super-renormalizable vector model.
description: 22 pages, 7 figures; substantial expansion, more results
Is the Brownian bridge a good noise model on the boundary of a circle?
Creators: name: Aletti, Giacomo
name: Ruffini, Matteo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: Primary 42A16, Secondary 60B15, 60G15

description: In this paper we study periodical stochastic processes, and we define the conditions that are needed by a model to be a good noise model on the circumference. The classes of processes that fit the required conditions are studied together with their expansion in random Fourier series in order to provide results about their path regularity. Finally, we discuss a simple and flexible parametric model with prescribed regularity that is used in applications, and we prove the asymptotic properties of the maximum likelihood estimates of model parameters.
description: 24pp, final version; the final publication is available at http://www.ism.ac.jp/editsec/aism/
Questions on calculation of primordial power spectrum with large spikes: the resonance model case
Creators: name: Inomata, Keisuke
name: Braglia, Matteo
name: Chen, Xingang
name: Renaux-Petel, Sébastien
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Inflationary models predicting a scale-dependent large amplification of the density perturbations have recently attracted a lot of attention because the amplified perturbations can seed a sizable amount of primordial black holes (PBHs) and stochastic background of gravitational waves (GWs). While the power spectra in these models are computed based on the linear equation of motion, it is not obvious whether loop corrections are negligible when such a large amplification occurs during inflation. In this paper, as a first step to discuss the loop corrections in such models, we use the in-in formalism and calculate the one-loop scalar power spectrum numerically and analytically in an illustrative model where the density perturbations are resonantly amplified due to oscillatory features in the inflaton potential. Our calculation is technically new in that the amplified perturbations are numerically taken into account in the in-in formalism for the first time. In arriving at our analytical estimates, we highlight the role that the Wronskian condition of perturbations, automatically satisfied in our model, plays in obtaining the correct estimates. We also discuss the necessary conditions for subdominant loop corrections in this model. We find that, for the typical parameter space leading to the $\mathcal O(10^7)$ amplification of the power spectrum required for a sufficient PBH production, the one-loop power spectrum dominates over the tree-level one, indicating the breakdown of the perturbation theory.
description: 42 pages, 14 figures, v3: An error in the equation of the two-vertex contribution corrected. Accordingly, the splitting of the two-vertex contribution changed and Appendix B added. The final one-loop power spectrum becomes smaller than the previous results, whereas the main conclusion (the typical oscillatory models lead to dominant loop power spectra) is unchanged
Process Tomography for Systems in a Thermal State
Creators: name: Ber, Ran
name: Marcovitch, Shmuel
name: Kenneth, Oded
name: Reznik, Benni
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a new method for implementing process tomography that is based on the information extracted from temporal correlations between observables, rather than on state preparation and state tomography. As such, the approach is applicable to systems that are in a mixed state, and in particular to thermal states. We illustrate the method for an arbitrary evolution described by Kraus operators, as well as for simpler cases such as a general Gaussian channels, and qubit dynamics.
Eigenmannia trilineata Lopez & Castello 1966
Creators: name: Giora, Júlia
name: Burns, John R.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Gymnotiformes
Sternopygidae
Eigenmannia
Eigenmannia trilineata

description: Spermatozoa of Eigenmannia trilineata
- Sternopygidae
The spermatozoa of Egenmannia trilineata are comprised of a spherical head (Fig. 3A) containing an ovoid nucleus (Fig. 1B), a distinct midpiece (Fig. 3 B-E), and single flagellum (Fig. 3 A-B). Nuclear length measured approximately 1.3 µm and width 1.3 µm. The nucleus contains masses of electron-dense flocculent chromatin in a lighter matrix (Fig. 3 B-E). Nuclear rotation takes place during spermiogenesis. The proximal centriole is anterior and perpendicular to the distal centriole and both centrioles are contained within a nuclear fossa (Fig. 3B). It was not possible to definitively identify a cytoplasmic collar in the region immediately posterior to the nucleus; however, more posteriorly a collar is lacking. The midpiece contains several elongate mitochondria (Fig. 3 B-D-E) and relatively few vesicles (Fig. 3 D-E). The flagellum has the usual 9 + 2 microtubular arrangement with no intratubular differentiation (Fig. 3 C-D). Along most of its length the flagellum has a pair of lateral projections or fins (Fig. 3C).
description: Published as part of Giora, Júlia & Burns, John R., 2011, Sperm ultrastructure in three different families of weakly electric fishes (Teleostei: Gymnotiformes), pp. 881-888 in Neotropical Ichthyology 9 (4) on page 884, DOI: 10.1590/S1679-62252011005000047, http://zenodo.org/record/5756622
Ewald Grothe, Jens Hacke (Hg.), Liberales Denken in der Krise der Weltkriegsepoche. Moritz Julius Bonn, Stuttgart (Franz Steiner Verlag) 2018
Creators: name: Bührer, Werner
Publisher: name: Francia-Recensio
Year: 2019

description: Ewald Grothe, Jens Hacke (Hg.), Liberales Denken in der Krise der Weltkriegsepoche. Moritz Julius Bonn, Stuttgart (Franz Steiner Verlag) 2018, 231 S. (Staatsdiskurse, 36), ISBN 978-3-515-12234-4, EUR 46,00.
description: Francia-Recensio, 2019/3
Coherent measurements in quantum metrology
Creators: name: Micadei, K.
name: Rowlands, D. A.
name: Pollock, F. A.
name: Céleri, L. C.
name: Serra, R. M.
name: Modi, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is well known that a quantum correlated probe can yield better precision in estimating an unknown parameter than classically possible. However, how such a quantum probe should be measured remains somewhat elusive. We examine the role of measurements in quantum metrology by considering two types of readout strategies: coherent, where all probes are measured simultaneously in an entangled basis; and adaptive, where probes are measured sequentially, with each measurement one way conditioned on the prior outcomes. Here we firstly show that for classically correlated probes the two readout strategies yield the same precision. Secondly, we construct an example of a noisy multipartite quantum system where coherent readout yields considerably better precision than adaptive readout. This highlights a fundamental difference between classical and quantum parameter estimation. From the practical point of view, our findings are relevant for the optimal design of precision-measurement quantum devices.
description: close to published version
Kleidung und Grabausstattung barbarischer Eliten im 5. Jahrhundert
Creators: name: Eger, Christoph
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 89 2011(2013)
A higher chromatic analogue of the image of J
Creators: name: Westerland, Craig
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 55P42, 55P20, 55N15, 19L20, 55Q51

description: We prove a higher chromatic analogue of Snaith's theorem which identifies the K-theory spectrum as the localisation of the suspension spectrum of CP^\infty away from the Bott class; in this result, higher Eilenberg-MacLane spaces play the role of CP^\infty = K(Z,2). Using this, we obtain a partial computation of the part of the Picard-graded homotopy of the K(n)-local sphere indexed by powers of a spectrum which for large primes is a shift of the Gross-Hopkins dual of the sphere. Our main technical tool is a K(n)-local notion generalising complex orientation to higher Eilenberg-MacLane spaces. As for complex-oriented theories, such an orientation produces a one-dimensional formal group law as an invariant of the cohomology theory. As an application, we prove a theorem that gives evidence for the chromatic redshift conjecture.
description: 43 pages, comments welcome. Version 4: further clarified sign character, streamlined arguments with homotopy fixed point spectra, added a new section on the monochromatic J-homomorphism
Jennifer Morscheiser-Niebergall, Die Anfänge Triers im Kontext augusteischer Urbanisierungspolitik nördlich der Alpen
Creators: name: Luik, Martin
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Jennifer Morscheiser-Niebergall, Die Anfänge Triers im Kontext augusteischer Urbanisierungspolitik nördlich der Alpen. Philippika. Marburger altertumskundliche Abhandlungen 30. Harrasowitz Verlag, Wiesbaden 2009. € 68,-. ISBN 978-3-447-06086-8. 258 Seiten mit 30 Abbildungen und 47 Tafeln
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 89 2011(2013)
On the Equivalence of Quadratic Optimization Problems Commonly Used in Portfolio Theory
Creators: name: Bodnar, Taras
name: Parolya, Nestor
name: Schmid, Wolfgang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Portfolio Management (q-fin.PM)
subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: Computational Finance (q-fin.CP)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: In the paper, we consider three quadratic optimization problems which are frequently applied in portfolio theory, i.e, the Markowitz mean-variance problem as well as the problems based on the mean-variance utility function and the quadratic utility.Conditions are derived under which the solutions of these three optimization procedures coincide and are lying on the efficient frontier, the set of mean-variance optimal portfolios. It is shown that the solutions of the Markowitz optimization problem and the quadratic utility problem are not always mean-variance efficient. The conditions for the mean-variance efficiency of the solutions depend on the unknown parameters of the asset returns. We deal with the problem of parameter uncertainty in detail and derive the probabilities that the estimated solutions of the Markowitz problem and the quadratic utility problem are mean-variance efficient. Because these probabilities deviate from one the above mentioned quadratic optimization problems are not stochastically equivalent. The obtained results are illustrated by an empirical study.
description: Revised preprint. To appear in European Journal of Operational Research. Contains 18 pages, 6 figures
Orsolya Heinrich-Tamáska / Niklot Krohn / Sebastian Ristow (Hrsg.), Dunkle Jahrhunderte in Mitteleuropa?
Creators: name: Freeden, Uta Von
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Orsolya Heinrich-Tamáska / Niklot Krohn / Sebastian Ristow (Hrsg.), Dunkle Jahrhunderte in Mitteleuropa? Tagungsbeiträge der Arbeitsgemeinschaft Spätantike und Frühmittelalter 1 und 2. Studien zu Spätantike und Frühmittelalter Band 1. Verlag Dr. Kovac, Hamburg 2009. ISBN 978-3-8300-4175-7. 424 Seiten mit 128 Abbildungen, 14 Tabellen
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 89 2011(2013)
Christoph Kümmel, Ur- und frühgeschichtlicher Grabraub
Creators: name: Koch, Ursula
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Christoph Kümmel, Ur- und frühgeschichtlicher Grabraub. Archäologische Interpretation und kulturanthropologische Erklärung. Tübinger Schriften zur Ur- und Frühgeschichtlichen Archäologie Band 9. Verlag Waxmann, Münster 2009. ISBN 978-3-8309-2205-6. 363 Seiten mit zahlreichen Abbildungen, Tabellen und Graphiken
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 89 2011(2013)
Fractional quantum Hall physics with ultracold Rydberg gases in artificial gauge fields
Creators: name: Grusdt, Fabian
name: Fleischhauer, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study ultracold Rydberg-dressed Bose gases subject to artificial gauge fields in the fractional quantum Hall (FQH) regime. The characteristics of the Rydberg interaction gives rise to interesting many-body ground states different from standard FQH physics in the lowest Landau level (LLL). The non-local but rapidly decreasing interaction potential favors crystalline ground states for very dilute systems. While a simple Wigner crystal becomes energetically favorable compared to the Laughlin liquid for filling fractions $ν<1/12$, a correlated crystal of composite particles emerges already for $ν\leq 1/6$ with a large energy gap to the simple Wigner crystal. The presence of a new length scale, the Rydberg blockade radius $a_B$, gives rise to a bubble crystal phase for $ν\lesssim 1/4$ when the average particle distance becomes less than $a_B$, which describes the region of saturated, almost constant interaction potential. For larger fillings indications for strongly correlated cluster liquids are found.
description: 9 pages, 10 figures, extended version with additional material
Splicing knot complements and bordered Floer homology
Creators: name: Hedden, Matthew
name: Levine, Adam Simon
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57M27, 57R58

description: We show that the integer homology sphere obtained by splicing two nontrivial knot complements in integer homology sphere L-spaces has Heegaard Floer homology rank strictly greater than one. In particular, splicing the complements of nontrivial knots in the 3-sphere never produces an L-space. The proof uses bordered Floer homology.
description: 25 pages. Revised version, to appear in Crelle's Journal. Errors from the original version have been corrected
Desingularization of Coassociative 4-folds with Conical Singularities: Obstructions and Applications
Creators: name: Lotay, Jason D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C38

description: We study the problem of desingularizing coassociative conical singularities via gluing, allowing for topological and analytic obstructions, and discuss applications. This extends the author's earlier work on the unobstructed case. We interpret the analytic obstructions geometrically via the obstruction theory for deformations of conically singular coassociative 4-folds, and thus relate them to the stability of the singularities. We use our results to describe the relationship between moduli spaces of coassociative 4-folds with conical singularities and those of their desingularizations. We also apply our theory in examples, including to the known conically singular coassociative 4-folds in compact holonomy G_2 manifolds.
description: 56 pages, v2: minor corrections and added comments, published version
Improved Tomographic Estimates by Specialised Neural Networks
Creators: name: Guarneri, Massimiliano
name: Gianani, Ilaria
name: Barbieri, Marco
name: Chiuri, Andrea
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Characterization of quantum objects, being them states, processes, or measurements, complemented by previous knowledge about them is a valuable approach, especially as it leads to routine procedures for real-life components. To this end, Machine Learning algorithms have demonstrated to successfully operate in presence of noise, especially for estimating specific physical parameters. Here we show that a neural network (NN) can improve the tomographic estimate of parameters by including a convolutional stage. We applied our technique to quantum process tomography for the characterization of several quantum channels. We demonstrate that a stable and reliable operation is achievable by training the network only with simulated data. The obtained results show the viability of this approach as an effective tool based on a completely new paradigm for the employment of NNs operating on classical data produced by quantum systems.
Generating and verifying graph states for fault-tolerant topological measurement-based quantum computing in 2D optical lattices
Creators: name: Joo, Jaewoo
name: Alba, Emilio
name: García-Ripoll, Juan José
name: Spiller, Timothy P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose two schemes for implementing graph states useful for fault-tolerant topological measurement-based quantum computation in 2D optical lattices. We show that bilayer cluster and surface code states can be created by global single-row and controlled-Z operations. The schemes benefit from the accessibility of atom addressing on 2D optical lattices and the existence of an efficient verification protocol which allows us to ensure the experimental feasibility of measuring the fidelity of the system against the ideal graph state. The simulation results show potential for a physical realization toward fault-tolerant measurement-based quantum computation against dephasing and unitary phase errors in optical lattices.
description: 6 pages and 4 figures (minor changed)
Kölner Maler der Spätgotik
Creators: name: Wallrath, Rolf
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 6 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Measuring Quantum Correlations using Lossy Photon-Number-Resolving Detectors with Saturation
Creators: name: Tan, Si-Hui
name: Krivitsky, Leonid A.
name: Englert, Berthold-Georg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The variance of difference of photocounts (VDPs) is an established measure of quantum correlations for quantum states of light. It enables us to discriminate between the classical correlation of a two-mode coherent state and the quantum correlation of a twin-beam state. We study the effect of loss and saturation of the photon-number-resolving detector on the measurement of the VDPs. An analytic function is derived for this variance, both for the coherent and the twin-beam states. It is found that the VDPs is no longer a reliable entanglement measure in the nonlinear regime of the detector response but it remains useful in some range of values of average photon numbers of the incident light. We also quantify the linear regime of the detector with saturation which will be useful for calibration of the detector quantum efficiency.
Untersuchung eines bronzezeitlichen Grabhügels in der Gilkenheide bei Schwitschen, Kr. Rotenburg/Wümme
Creators: name: Dehnke, Rudolf
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Twisted carotenoids do not support efficient intramolecular singlet fission in the orange carotenoid protein
Creators: name: Sutherland, George A.
name: Pidgeon, James P.
name: Lee, Harrison Ka Hin
name: Proctor, Matthew S.
name: Hitchcock, Andrew
name: Wang, Shuangqing
name: Chekulaev, Dimitri
name: Tsoi, Wing Chung
name: Johnson, Matthew P.
name: Hunter, C. Neil
name: Clark, Jenny
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Singlet exciton fission is the spin-allowed generation of two triplet electronic excited states from a singlet state. Intramolecular singlet fission has been suggested to occur on individual carotenoid molecules within protein complexes, provided the conjugated backbone is twisted out-of-plane. However, this hypothesis has only been forwarded in protein complexes containing multiple carotenoids and bacteriochlorophylls in close contact. To test the hypothesis on twisted carotenoids in a 'minimal' one-carotenoid system, we study the orange carotenoid protein (OCP). OCP exists in two forms: in its orange form (OCPo), the single bound carotenoid is twisted, whereas in its red form (OCPr), the carotenoid is planar. To enable room-temperature spectroscopy on canthaxanthin-binding OCPo and OCPr without laser-induced photoconversion, we trap them in trehalose glass. Using transient absorption spectroscopy, we show that there is no evidence of long-lived triplet generation through intramolecular singlet fission, despite the canthaxanthin twist in OCPo.
Ausgrabung eines Körpergräberfriedhofes bei Holtebüttel-Nindorf, Kr. Verden/Aller
Creators: name: Kamolz, G.
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Grabungen auf der mittelalterlichen Burg Hausfreden bei Freden, Kr. Alfeld/Leine
Creators: name: Janssen, Walter
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Odd elasticity of a catalytic micromachine
Creators: name: Kobayashi, Akira
name: Yasuda, Kento
name: Ishimoto, Kenta
name: Lin, Li-Shing
name: Sou, Isamu
name: Hosaka, Yuto
name: Komura, Shigeyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We perform numerical simulations of a model micromachine driven by catalytic chemical reactions. Our model includes a mechano-chemical coupling between the structural variables and the nonequilibrium variable describing the catalytic reactions. The time-correlation functions of the structural variables are calculated and further analyzed in terms of odd Langevin dynamics. We obtain the effective odd elastic constant that manifests the broken time-reversal symmetry of a catalytic micromachine. Within the simulation, we separately estimate the quantity called nonreciprocality and show that its behavior is similar to that of the odd elasticity.Our approach suggests a new method to extract the nonequilibrium properties of a micromachine only by measuring its structural dynamics.
Mittelalterliche Keramik von der Burgstelle Neubruchhausen, Kr. Grafschaft Hoya
Creators: name: Janssen, Walter
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Factors Affecting the Storage Life of Bartlett, Magness, and Moonglow Pears
Creators: name: Smith, W. L.
name: Hruschka, Howard W.
name: Smith, W. L.
name: Hruschka, Howard W.
Publisher: name: Unknown
Year: 1978
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Pears stored near 0°C at high relative humidity (rh about 95 percent) developed more core breakdown but less surface scald than those stored at lower rh's (90 and 85 percent). Breakdown usually was not evident until after the pears had ripened at 18°. Some scald was present when the pears were removed from 0° storage, and the severity increased during ripening. 'Bartlett' pears developed core breakdown after 2 months of storage and ripening, compared with 4 months for 'Moonglow' and 'Magness'. Moonglow developed the least amount of breakdown but the greatest amount of scald. Pears stored at the lowest rh lost the most weight and were softer after storage than those stored at the highest rh. Date of harvest had little effect on breakdown, scald, or soluble solids content. The intermittent warming treatment (24 hours at 18° after 1, 2, or 3 months of 0° storage) had no significant effect on shrivel, scald, core breakdown, or soluble solids content. Decay was not severe until after 4 months of storage and ripening. Decay was not affected by rh during storage, but more developed in pears which received the intermittent warming treatment than in those stored constantly at 0°.
Dense matter is strong magnetic fields
Creators: name: Sinha, Monika
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Compact stars having strong magnetic fields (magnetars) have been observationally determined to have surface magnetic fields of order of 10^14-10^15 G, the implied internal field strength being several orders larger. We study the equation of state and composition of hypernuclear matter and quark matter - two forms of dense matter in strong magnetic fields. We find that the magnetic field has substantial influence on the properties of hypernuclear matter and quark matter for magnetic field B \ge 10^17 G and B \ge 10^18 G respectively. In particular the matter properties become anisotropic. Moreover, above a critical field B_cr, both hypernuclear and quark matter show instability, although the values of B_cr are different for two kinds of matter.
description: 6 pages, 2 figures: Older version has been moved to 1005.4995 as version 3. This version has been prepared as Proceedings of International Conference on "The Modern Physics of Compact Stars and Relativistic Gravity", 18-21 September 2013, Yerevan, Armenia with related material