cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On standing sausage waves in photospheric magnetic waveguides
Creators: name: Dorotovic, I.
name: Erdelyi, R.
name: Freij, N.
name: Karlovsky, V.
name: Marquez, I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: By focusing on the oscillations of the cross-sectional area and the intensity of magnetic waveguides located in the lower solar atmosphere, we aim to detect and identify magnetohydrodynamic (MHD) sausage waves. Capturing several series of high-resolution images of pores and sunspots and employing wavelet analysis in conjunction with empirical mode decomposition (EMD) makes the MHD wave analysis possible. For this paper, two sunspots and one pore (with a light bridge) were chosen as representative examples of MHD waveguides in the lower solar atmosphere. The sunspots and pore display a range of periods from 4 to 65 minutes. The sunspots support longer periods than the pore - generally enabling a doubling or quadrupling of the maximum pore oscillatory period. All of these structures display area oscillations indicative of MHD sausage modes and in-phase behaviour between the area and intensity, presenting mounting evidence for the presence of the slow sausage mode within these waveguides. The presence of fast and slow MHD sausage waves has been detected in three different magnetic waveguides in the lower solar photosphere. Furthermore, these oscillations are potentially standing harmonics supported in the waveguides which are sandwiched vertically between the temperature minimum in the lower solar atmosphere and the transition region. Standing harmonic oscillations, by means of solar magneto-seismology, may allow insight into the sub-resolution structure of photospheric MHD waveguides.
description: 7 Pages, 7 figures and accepted for publication in A&A
A universal expectation bound on empirical projections of deformed random matrices
Creators: name: Jurczak, Kamil
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Let $C$ be a real-valued $M\times M$ matrix with singular values $λ_1\ge...\geλ_M$ and $E$ a random matrix of centered i.i.d. entries with finite fourth moment. In this paper we give a universal upper bound on the expectation of $||\hatπ_rX||_{S_2}^2-||π_rX||^2_{S_2}$, where $X:=C+E$ and $\hatπ_r$ (resp. $π_r$) is a rank-$r$ projection maximizing the Hilbert-Schmidt norm $||\tildeπ_rX||_{S_2}$ (resp. $||\tildeπ_rC||_{S_2}$) over the set $§_{M,r}$ of all orthogonal rank-$r$ projections. This result is a generalization of a theorem for Gaussian matrices due to Rohde (2012). Our approach differs substantially from the techniques of the mentioned article. We analyze $||\hatπ_rX||_{S_2}^2-||π_rX||^2_{S_2}$ from a rather deterministic point of view by an upper bound on $||\hatπ_rX||_{S_2}^2-||π_rX||^2_{S_2}$, whose randomness is totally determined by the largest singular value of $E$.
description: The final publication is available at link.springer.com/article/10.1007%2Fs10959-013-0517-9
Photo-Induced Topological Phase Transition and a Single Dirac-Cone State in Silicene
Creators: name: Ezawa, Motohiko
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Silicene (a monolayer of silicon atoms) is a quantum spin Hall insulator (QSHI), which undergoes a topological phase transition to a band insulator under external electric field $E_{z}$. We investigate a photo-induced topological phase transition by irradiating circular polarized light at fixed $E_{z}$. The band structure and also the topological property are modified by photon dressing. By increasing the intensity of light at $E_{z}=0 $, a photo-induced quantum Hall insulator (P-QHI) is realized, where the quantum Hall effect occurs without magnetic field. Its edge modes are anisotropic chiral, in which the velocities of up and down spins are different. There appears a spin polarized metal characterized by topological flat bands at the critical point between the QSHI and P-QHI. At $E_{z}>E_{\text{cr}}$ with a certain critical field $E_{\text{cr}}$, a photo-induced spin-polarized quantum Hall insulator emerge. This is a new state of matter, possessing one Chern number and one half spin-Chern numbers. The edge mode supports a perfectly spin-polarized current, which are different from the chiral or helical edge modes. We newly discovered a single Dirac-cone state along a phase boundary. A distinctive hallmark of the state is that one of the two Dirac valleys is closed with a linear dispersion and the other open with a parabolic dispersion.
description: 4 pages, 4 figures. arXiv admin note: text overlap with arXiv:1206.5378
Suppression of quantum-radiation-pressure noise in an optical spring
Creators: name: Korth, W. Zach
name: Miao, Haixing
name: Corbitt, Thomas
name: Cole, Garrett D.
name: Chen, Yanbei
name: Adhikari, Rana X.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Recent advances in micro- and nanofabrication techniques have led to corresponding improvement in the performance of optomechanical systems, which provide a promising avenue towards quantum-limited metrology and the study of quantum behavior in macroscopic mechanical objects. One major impediment to reaching the quantum regime is thermal excitation, which can be overcome for sufficiently high mechanical quality factor Q. Here, we propose a method for increasing the effective Q of a mechanical resonator by stiffening it via the optical spring effect exhibited by linear optomechanical systems, and show how the associated quantum radiation pressure noise can be evaded by sensing and feedback control. In a parameter regime that is attainable with current technology, this method allows for realistic quantum cavity optomechanics in a frequency band well below that which has been realized thus far.
description: 11 pages (with appendix), 3 figures
The Topology of Quantum Algorithms
Creators: name: Vicary, Jamie
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use a categorical topological semantics to examine the Deutsch-Jozsa, hidden subgroup and single-shot Grover algorithms. This reveals important structures hidden by conventional algebraic presentations, and allows novel proofs of correctness via local topological operations, giving for the first time a satisfying high-level explanation for why these procedures work. We also investigate generalizations of these algorithms, providing improved analyses of those already in the literature, and a new generalization of the single-shot Grover algorithm.
description: 33 pages. Updated to match the final published article
Bayesian Posterior Contraction Rates for Linear Severely Ill-posed Inverse Problems
Creators: name: Agapiou, Sergios
name: Stuart, Andrew M.
name: Zhang, Yuan-Xiang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G20, 62C10, 35R30, 45Q05

description: We consider a class of linear ill-posed inverse problems arising from inversion of a compact operator with singular values which decay exponentially to zero. We adopt a Bayesian approach, assuming a Gaussian prior on the unknown function. If the observational noise is assumed to be Gaussian then this prior is conjugate to the likelihood so that the posterior distribution is also Gaussian. We study Bayesian posterior consistency in the small observational noise limit. We assume that the forward operator and the prior and noise covariance operators commute with one another. We show how, for given smoothness assumptions on the truth, the scale parameter of the prior can be adjusted to optimize the rate of posterior contraction to the truth, and we explicitly compute the logarithmic rate.
description: 25 pages, 2 figures
An alternate well-founded way to treat the center-of-mass correlations: use of a local center-of-mass correlations potential
Creators: name: Messud, Jeremie
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The recently developed "internal" Density Functional Theory provides an existence theorem for a local potential that contains the center-of-mass correlations effects. The knowledge of the corresponding energy functional would provide a much cheaper way than projection techniques to treat these correlations. The aim of this article is to construct such a functional. We propose a well-founded method, suitable for Fermions as well as for Bosons, which does not require any free parameters.
description: 17 pages, 4 figures, 4 tables, 36 references
Cohomology for Frobenius kernels of $SL_2$
Creators: name: Ngo, Nham V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Commutative Algebra (math.AC)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 20G05, 20G10, 20G42, 13A99

description: Let $(SL_2)_r$ be the $r$-th Frobenius kernels of the group scheme $SL_2$ defined over an algebraically field of characteristic $p>2$. In this paper we give for $r\ge 1$ a complete description of the cohomology groups for $(SL_2)_r$. We also prove that the reduced cohomology ring $\opH^\bullet((SL_2)_r,k)_{\red}$ is Cohen-Macaulay. Geometrically, we show for each $r\ge 1$ that the maximal ideal spectrum of the cohomology ring for $(SL_2)_r$ is homeomorphic to the fiber product $G\times_B\fraku^r$. Finally, we adapt our calculations to obtain analogous results for the cohomology of higher Frobenius-Luzstig kernels of quantized enveloping algebras of type $SL_2$.
description: published version; a section for the case p=2 is added
Stability of zero-mode Landau levels in bilayer graphene against disorder in the presence of the trigonal warping
Creators: name: Kawarabayashi, Tohru
name: Hatsugai, Yasuhiro
name: Aoki, Hideo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The stability of the zero-energy Landau levels in bilayer graphene against the chiral symmetric disorder is examined in the presence of the trigonal warping. Based on the tight-binding lattice model with a bond disorder correlated over several lattice constants, it is shown that among the four Landau levels per spin and per valley, two Landau levels exhibit the anomalous sharpness as in the absence of the trigonal warping, while the other two are broadened, yielding split peaks in the density of states. This can be attributed to the fact that the total chirality in each valley is +2 or -2, which is protected topologically even in the presence of an intra-valley scattering due to disorder.
description: 4 pages, 2 figures, submitted to the proceedings of the 20th International conference on High Magnetic Field in Semiconductor Physics
A Measurement of the Cosmic Microwave Background Damping Tail from the 2500-square-degree SPT-SZ survey
Creators: name: Story, K. T.
name: Reichardt, C. L.
name: Hou, Z.
name: Keisler, R.
name: Aird, K. A.
name: Benson, B. A.
name: Bleem, L. E.
name: Carlstrom, J. E.
name: Chang, C. L.
name: Cho, H-M.
name: Crawford, T. M.
name: Crites, A. T.
name: de Haan, T.
name: Dobbs, M. A.
name: Dudley, J.
name: Follin, B.
name: George, E. M.
name: Halverson, N. W.
name: Holder, G. P.
name: Holzapfel, W. L.
name: Hoover, S.
name: Hrubes, J. D.
name: Joy, M.
name: Knox, L.
name: Lee, A. T.
name: Leitch, E. M.
name: Lueker, M.
name: Luong-Van, D.
name: McMahon, J. J.
name: Mehl, J.
name: Meyer, S. S.
name: Millea, M.
name: Mohr, J. J.
name: Montroy, T. E.
name: Padin, S.
name: Plagge, T.
name: Pryke, C.
name: Ruhl, J. E.
name: Sayre, J. T.
name: Schaffer, K. K.
name: Shaw, L.
name: Shirokoff, E.
name: Spieler, H. G.
name: Staniszewski, Z.
name: Stark, A. A.
name: van Engelen, A.
name: Vanderlinde, K.
name: Vieira, J. D.
name: Williamson, R.
name: Zahn, O.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a measurement of the cosmic microwave background (CMB) temperature power spectrum using data from the recently completed South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. This measurement is made from observations of 2540 deg$^2$ of sky with arcminute resolution at $150\,$GHz, and improves upon previous measurements using the SPT by tripling the sky area. We report CMB temperature anisotropy power over the multipole range $650
description: 21 pages, 10 figures. Replaced with version accepted by ApJ. Data products are available at http://pole.uchicago.edu/public/data/story12/
Examples of weakly amenable discrete quantum groups
Creators: name: Freslon, Amaury
Publisher: name: arXiv
Year: 2012
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We prove that Wang's free orthogonal and free unitary quantum groups are weakly amenable and that their Cowling-Haagerup constant is equal to 1. This is achieved by estimating the completely bounded norm of the projections on the coefficients of irreducible representations of their compact duals. An argument of monoidal equivalence then allows us to extend this result to quantum automorphism groups of finite spaces and even yields some examples of weakly amenable non-unimodular discrete quantum groups with the Haagerup property.
description: 25 pages
Computation of Jeffrey-Kirwan residue using Gröbner basis
Creators: name: Szilágyi, Zsolt
Publisher: name: arXiv
Year: 2012
Subjects: subject: Commutative Algebra (math.AC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The Jeffrey-Kirwan residue is a powerful tool for computation of intersection numbers or volume of symplectic quotients. In this article, we give an algorithm to compute it using Gröbner bases. Our result is parallel to that of Cattani-Dickenstein for Grothendieck residues.
description: 12 pages. Section 6 rewritten
Entropic fluctuations in XY chains and reflectionless Jacobi matrices
Creators: name: Jaksic, V.
name: Landon, B.
name: Pillet, C. -A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the entropic fluctuations of a general XY spin chain where initially the left(x<0)/right(x>0) part of the chain is in thermal equilibrium at inverse temperature Tl/Tr. The temperature differential results in a non-trivial energy/entropy flux across the chain. The Evans-Searles (ES) entropic functional describes fluctuations of the flux observable with respect to the initial state while the Gallavotti-Cohen (GC) functional describes these fluctuations with respect to the steady state (NESS) the chain reaches in the large time limit. We also consider the full counting statistics (FCS) of the energy/entropy flux associated to a repeated measurement protocol, the variational entropic functional (VAR) that arises as the quantization of the variational characterization of the classical Evans-Searles functional and a natural class of entropic functionals that interpolate between FCS and VAR. We compute these functionals in closed form in terms of the scattering data of the Jacobi matrix h canonically associated to the XY chain. We show that all these functionals are identical if and only if h is reflectionless (we call this phenomenon entropic identity). If h is not reflectionless, then the ES and GC functionals remain equal but differ from the FCS, VAR and interpolating functionals. Furthermore, in the non-reflectionless case, the ES/GC functional does not vanish at 1 (i.e., the Kawasaki identity fails) and does not have the celebrated ES/GC symmetry. The FCS, VAR and interpolating functionals always have this symmetry. In the cases where h is a Schrödinger operator, the entropic identity leads to some unexpected open problems in the spectral theory of one-dimensional discrete Schrödinger operators.
Affine group representation formalism for four dimensional, Lorentzian, quantum gravity
Creators: name: Ching-Yi, Chou
name: Ita, Eyo
name: Soo, Chopin
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Within the context of the Ashtekar variables, the Hamiltonian constraint of four-dimensional pure General Relativity with cosmological constant, $Λ$, is reexpressed as an affine algebra with the commutator of the imaginary part of the Chern-Simons functional, $Q$, and the positive-definite volume element. This demonstrates that the affine algebra quantization program of Klauder can indeed be applicable to the full Lorentzian signature theory of quantum gravity with non-vanishing cosmological constant; and it facilitates the construction of solutions to all of the constraints. Unitary, irreducible representations of the affine group exhibit a natural Hilbert space structure, and coherent states and other physical states can be generated from a fiducial state. It is also intriguing that formulation of the Hamiltonian constraint or Wheeler-DeWitt equation as an affine algebra requires a non-vanishing cosmological constant; and a fundamental uncertainty relation of the form $\frac{Δ{V}}{}Δ{Q}\geq 2πΛL^2_{Planck}$ (wherein $V$ is the total volume) may apply to all physical states of quantum gravity.
description: 13 pages. Revised version
The Benefits of VLBI Astrometry to Pulsar Timing Array Searches for Gravitational Radiation
Creators: name: Madison, D. R.
name: Chatterjee, S.
name: Cordes, J. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Precision astrometry is an integral component of successful pulsar timing campaigns. Astrometric parameters are commonly derived by fitting them as parameters of a timing model to a series of pulse times of arrival (TOAs). TOAs measured to microsecond precision over several-year spans can yield position measurements with sub-milliarcsecond precision. However, timing-based astrometry can become biased if a pulsar displays any red spin noise, which can be compared to the red noise signal produced by the stochastic gravitational wave background. We investigate how noise of different spectral types is absorbed by timing models, leading to significant estimation errors in the astrometric parameters. We find that commonly used techniques for fitting timing models in the presence of red noise (Cholesky whitening) prevent the absorption of noise into the timing model remarkably well if the time baseline of observations exceeds several years, but are inadequate for dealing with shorter pulsar data sets. Independent of timing, pulsar-optimized very long baseline interferometry (VLBI) is capable of providing position estimates precise to the sub-milliarcsecond levels needed for high-precision timing. We compute a necessary transformation between the International Celestial Reference Frame and pulsar timing frames and quantitatively discuss how the transformation will improve in coming years. We find that incorporating VLBI astrometry into the timing models of pulsars for which only a couple of years of timing data exist will lead to more realistic assessments of red spin noise and could enhance the amplitude of gravitational wave signatures in post-fit timing residuals by factors of 20 or more.
description: Published in Astrophysical Journal 777:104, 2013 November 10
On the Radio and Optical Luminosity Evolution of Quasars II - The SDSS Sample
Creators: name: Singal, J.
name: Petrosian, V.
name: Stawarz, L.
name: Lawrence, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We determine the radio and optical luminosity evolutions and the true distribution of the radio loudness parameter R, defined as the ratio of the radio to optical luminosity, for a set of more than 5000 quasars combining SDSS optical and FIRST radio data. We apply the method of Efron and Petrosian to access the intrinsic distribution parameters, taking into account the truncations and correlations inherent in the data. We find that the population exhibits strong positive evolution with redshift in both wavebands, with somewhat greater radio evolution than optical. With the luminosity evolutions accounted for, we determine the density evolutions and local radio and optical luminosity functions. The intrinsic distribution of the radio loudness parameter R is found to be quite different than the observed one, and is smooth with no evidence of a bi-modality in radio loudness. The results we find are in general agreement with the previous analysis of Singal et al. 2011 which used POSS-I optical and FIRST radio data.
description: 16 pages, 17 figures, 1 table. Updated to journal version. arXiv admin note: substantial text overlap with arXiv:1101.2930
Predictions from Heavy New Physics Interpretation of the Top Forward-Backward Asymmetry
Creators: name: Delaunay, Cédric
name: Gedalia, Oram
name: Hochberg, Yonit
name: Soreq, Yotam
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive generic predictions at hadron colliders from the large forward-backward asymmetry observed at the Tevatron, assuming the latter arises from heavy new physics beyond the Standard Model. We use an effective field theory approach to characterize the associated unknown dynamics. By fitting the Tevatron t \bar t data we derive constraints on the form of the new physics. Furthermore, we show that heavy new physics explaining the Tevatron data generically enhances at high invariant masses both the top pair production cross section and the charge asymmetry at the LHC. This enhancement can be within the sensitivity of the 8 TeV run, such that the 2012 LHC data should be able to exclude a large class of models of heavy new physics or provide hints for its presence. The same new physics implies a contribution to the forward-backward asymmetry in bottom pair production at low invariant masses of order a permil at most.
description: 11 pages, 6 figures. v2: added remarks on EFT validity range, dijet bounds and UV completions; matches published version
A variation norm Carleson theorem for vector-valued Walsh-Fourier series
Creators: name: Hytönen, Tuomas P.
name: Lacey, Michael T.
name: Parissis, Ioannis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: Primary 42B20, Secondary 46E40

description: We prove a variation norm Carleson theorem for Walsh-Fourier series of functions with values in a UMD Banach space. Our only hypothesis on the Banach space is that it has finite tile-type, a notion introduced by Hytönen and Lacey. Given q \geq 2 we show that, if the space X has tile-type t for all t>q, then the r-variation of the Walsh-Fourier sums of any function f \in L^p ([0,1) ; X) belongs to L^p, whenever qq. For intermediate spaces, i.e. spaces X= [Y,H]_s which are complex interpolation spaces between some UMD space Y and a Hilbert space H, the tile-type is q=2/s. We show that in this case the variation norm Carleson theorem remains true for all r > q in the larger range p > (2r/q)'.
description: 37 pages, v2: the statements of the size and density lemmas are more flexible, and the proof of the main theorem more streamlined; incorporates referee's reports. To appear in Rev. Mat. Iberoam
Über die Gesteinsrohstoffe der Michelsberger Kultur von Bruchsal-Aue und vom Michelsberg bei Untergrombach
Creators: name: Baranyi, István
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
Ein Pollenprofil aus dem ehemaligen Fischweiher des Herzogs von Württemberg bei Nabern, Stadt Kirchheim/Teck, zur Kenntnis der Kulturlandschaftsgeschichte des Späten Mittelalters und der Frühen Neuzeit im Vorland der Schwäbischen Alb
Creators: name: Rösch, Manfred
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
Non-scale-invariant inverse curvature flows in hyperbolic space
Creators: name: Scheuer, Julian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider inverse curvature flows in hyperbolic space with starshaped initial hypersurface, driven by positive powers of a homogeneous curvature function. The solutions exist for all time and, after rescaling, converge to a sphere.
description: The rescaling, under which the flow hypersurfaces converge to a constant, had to be modified due to a mistake in the corresponding proof in the first version. Several typing errors were corrected
p-adic path set fractals and arithmetic
Creators: name: Abram, William
name: Lagarias, Jeffrey C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 11K55, 11S82, 28A80, 37B10

description: This paper considers a class C(Z_p) of closed sets of the p-adic integers obtained by graph-directed constructions analogous to those of Mauldin and Williams over the real numbers. These sets are characterized as collections of those p-adic integers whose p-adic expansions are describeed by paths in the graph of a finite automaton issuing from a distinguished initial vertex. This paper shows that this class of sets is closed under the arithmetic operations of addition and multiplication by p-integral rational numbers. In addition the Minkowski sum (under p-adic addition) of two set in the class is shown to also belong to this class. These results represent purely p-adic phenomena in that analogous closure properties do not hold over the real numbers. We also show the existence of computable formulas for the Hausdorff dimensions of such sets.
description: v1 24 pages; v2 added to title, 28 pages; v3, 30 pages, added concluding section, v.4, incorporate changes requested by reviewer
Ludwig Berger, Marco Brianza, Paul Gutzwiller, Marcel Joos, Markus Peter, Philippe Rentzel, Jörg Schibler, Willem B. Stern, Sondierungen auf dem Wittnauer Horn 1980-1982
Creators: name: Menzel, Peter
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Rezension zu: Ludwig Berger, Marco Brianza, Paul Gutzwiller, Marcel Joos, Markus Peter, Philippe Rentzel, Jörg Schibler, Willem B. Stern, Sondierungen auf dem Wittnauer Horn 1980-1982. Basler Beiträge zur Ur- und Frühgeschichte Band 14. Habegger Verlag Derendingen-Solothurn (1996). 92 Seiten, zahlreiche s/w- und Farbabbildungen. ISBN 38-5723-372-9.
description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
Simonetta Biaggio Simona, I Vetri Romani Provenienti Dalle Terre Dell’Attuale Cantone Ticino
Creators: name: Follmann-Schulz, Anna-Barbara
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Simonetta Biaggio Simona, I Vetri Romani Provenienti Dalle Terre Dell’Attuale Cantone Ticino. Volume I—II. Armando Dado editore, Locarno 1991. ISBN 88-85115-23-3. 406 Seiten mit zahlreichen Tabellen und Graphiken, 49 Tafeln und 93 Abbildungen (Vol. I); ca. 600 Seiten Katalog (Vol. II)
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 72 Nr. 1 (1994)
Computation of biochemical pathway fluctuations beyond the linear noise approximation using iNA
Creators: name: Thomas, Philipp
name: Matuschek, Hannes
name: Grima, Ramon
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: The linear noise approximation is commonly used to obtain intrinsic noise statistics for biochemical networks. These estimates are accurate for networks with large numbers of molecules. However it is well known that many biochemical networks are characterized by at least one species with a small number of molecules. We here describe version 0.3 of the software intrinsic Noise Analyzer (iNA) which allows for accurate computation of noise statistics over wide ranges of molecule numbers. This is achieved by calculating the next order corrections to the linear noise approximation's estimates of variance and covariance of concentration fluctuations. The efficiency of the methods is significantly improved by automated just-in-time compilation using the LLVM framework leading to a fluctuation analysis which typically outperforms that obtained by means of exact stochastic simulations. iNA is hence particularly well suited for the needs of the computational biology community.
description: 5 pages, 2 figures, conference proceeding IEEE International Conference on Bioinformatics and Biomedicine (BIBM) 2012
On the geometry of von Neumann algebra preduals
Creators: name: Martin, Miguel
name: Ueda, Yoshimichi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Let $M$ be a von Neumann algebra and let $M_\star$ be its (unique) predual. We study when for every $φ\in M_\star$ there exists $ψ\in M_\star$ solving the equation $\|φ\pm ψ\|=\|φ\|=\|ψ\|$. This is the case when $M$ does not contain type I nor type III$_1$ factors as direct summands and it is false at least for the unique hyperfinite type III$_1$ factor. We also characterize this property in terms of the existence of centrally symmetric curves in the unit sphere of $M_\star$ of length 4. An approximate result valid for all diffuse von Neumann algebras allows to show that the equation has solution for every element in the ultraproduct of preduals of diffuse von Neumann algebras and, in particular, the dual von Neumann algebra of such ultraproduct is diffuse. This shows that the Daugavet property and the uniform Daugavet property are equivalent for preduals of von Neumann algebras.
description: 10 pages; some facts added; to appear in Positivity
Form-free size distributions from complementary stereological TEM/SAXS on precipitates in a Mg-Zn alloy
Creators: name: Rosalie, Julian M.
name: Pauw, Brian R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This work describes a multidisciplinary research methodology for quantifying the size distribution of nanoscale precipitates in polycrystalline alloys. Complementary transmission electron microscopy (TEM) and small-angle x-ray scattering (SAXS) are employed in a study of precipitate growth in an isothermally aged Mg-Zn alloy. TEM is used to identify the precipitate phases as rod-shaped β' particles and to determine their radii and aspect ratio. Subsequently, SAXS data obtained from bulk quantities of the alloy is interpreted via a novel Monte-Carlo method to obtain accurate, form-free size distributions. Good agreement was obtained between particle radii distributions measured by both methods, exemplifying the applicability of this complementary methodology to study precipitation in textured alloys containing particles anisotropic with well-defined orientation-relationships to the matrix.
description: Author accepted manuscript, 23 pages, 11 figures
Parabolic theory of the discrete p-Laplace operator
Creators: name: Mugnolo, Delio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 39A12, 47H20, 05C50

description: We study the discrete version of the $p$-Laplacian. Based on its variational properties we discuss some features of the associated parabolic problem. Our approach allows us in turn to obtain interesting information about positivity and comparison principles as well as compatibility with the symmetries of the graph. We conclude briefly discussing the variational properties of a handful of nonlinear generalized Laplacians appearing in different parabolic equations.
description: 35 pages several corrections and enhancements in comparison to the v1
Cross-correlations mediated by Majorana bound states
Creators: name: Wang, Peiyue
name: Cao, Yunshan
name: Gong, Ming
name: Xiong, Gang
name: Li, Xin-Qi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the correlated parallel transport through two quantum dots which are tunnel-coupled to the ends of a semiconductor nanowire where the Majorana bound states (MBSs) may emerge under proper conditions. In terms of the cross-correlation of currents, we reveal unusual behaviors originated from the nonlocal MBSs, including such as the distinct symmetry and antisymmetry of the spectral density in response to the dot-level modulations, and the vanished cross correlation occurred when any of the dot-levels is in resonance with the Majorana zero mode.
Verloren, aber nicht vergessen: das Kaufhaus Schocken in Stuttgart
Creators: name: Breuer, Judith
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2019

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 48 Nr. 3 (2019)
Mott transitions in the Hubbard model with spatially-modulated interactions
Creators: name: Koga, Akihisa
name: Saitou, Takamitsu
name: Yamamoto, Atsushi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study two-component fermions in optical lattices with spatially alternating on-site interactions using dynamical mean-field theory. Calculating the quasi-particle weight, double occupancy, and order parameters for each sublattice, we discuss the low-temperature properties of the system. When both interactions are repulsive, the magnetically ordered state is realized at half-filling. In the attractive case, the superfluid state is, in general, realized with a particle number imbalance. On the other hand, when repulsive and attractive interactions are comparable in the half-filled system, the magnetically ordered and superfluid states are not realized, but the metal-insulator transition occurs. This transition is characterized by the Mott and pairing transitions discussed in the conventional repulsive and attractive Hubbard models. In the doped system, commensurability emerges owing to the repulsive interactions and the metal-insulator transition occurs down to quarter-filling.
description: 8 pages, 11 figures
Personalia
Creators: name: Redaktion, Die
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2019

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 48 Nr. 3 (2019)
Prediction of the bias voltage dependent magnetic contrast in spin-polarized scanning tunneling microscopy
Creators: name: Palotás, Krisztián
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: This work is concerned with the theoretical description of the contrast, i.e., the apparent height difference between two lateral surface positions on constant current spin-polarized scanning tunneling microscopy (SP-STM) images. We propose a method to predict the bias voltage dependent magnetic contrast from single point tunneling current or differential conductance measurements, without the need of scanning large areas of the surface. Depending on the number of single point measurements, the bias positions of magnetic contrast reversals and of the maximally achievable magnetic contrast can be determined. We validate this proposal by simulating SP-STM images on a complex magnetic surface employing a recently developed approach based on atomic superposition. Furthermore, we show evidence that the tip electronic structure and magnetic orientation have a major effect on the magnetic contrast. Our theoretical prediction is expected to inspire experimentalists to considerably reduce measurement efforts for determining the bias dependent magnetic contrast on magnetic surfaces.
description: 28 pages manuscript, 1 table, 6 figures
Stochastic Sensor Scheduling for Networked Control Systems
Creators: name: Farokhi, Farhad
name: Johansson, Karl H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Optimal sensor scheduling with applications to networked estimation and control systems is considered. We model sensor measurement and transmission instances using jumps between states of a continuous-time Markov chain. We introduce a cost function for this Markov chain as the summation of terms depending on the average sampling frequencies of the subsystems and the effort needed for changing the parameters of the underlying Markov chain. By minimizing this cost function through extending Brockett's recent approach to optimal control of Markov chains, we extract an optimal scheduling policy to fairly allocate the network resources among the control loops. We study the statistical properties of this scheduling policy in order to compute upper bounds for the closed-loop performance of the networked system, where several decoupled scalar subsystems are connected to their corresponding estimator or controller through a shared communication medium. We generalize the estimation results to observable subsystems of arbitrary order. Finally, we illustrate the developed results numerically on a networked system composed of several decoupled water tanks.
description: Corrected Typos
Adama van Scheltema, F.: Die Kunst der Vorzeit
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Adama van Scheltema, F.: Die Kunst der Vorzeit. 8°. 207 Seiten mit XLVIII Taf. und 60 Abb. im Text. W. Kohlhammer- Verlag. Stuttgart 1950
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 21 (1952): Nachrichten aus Niedersachsens Urgeschichte
Boeles, P. C. A.: Friesland tot de elfde eeuw
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Boeles, P. C. A.: Friesland tot de elfde eeuw. 2. Aufl. 8°. 598 S. Mit 90 Abb. im Text, 55 Taf. und 2 Karten. 's-Gravenhage 1951. Verlag Martinus Nijhoff.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 21 (1952): Nachrichten aus Niedersachsens Urgeschichte
Transverse string topology and the cord algebra
Creators: name: Basu, Somnath
name: McGibbon, Jason
name: Sullivan, Dennis
name: Sullivan, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We define a coalgebra structure for open strings transverse to any framed codimension 2 submanifold. When the submanifold is a knot in R^3, we show this structure recovers a specialization of the Ng cord algebra, a non-trivial knot invariant which is not determined by a number of other knot invariants.
description: 12 pages, 4 figures
Regularizing cosmological singularities by varying physical constants
Creators: name: Dabrowski, Mariusz P.
name: Marosek, Konrad
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Varying physical constant cosmologies were claimed to solve standard cosmological problems such as the horizon, the flatness and the $Λ$-problem. In this paper, we suggest yet another possible application of these theories: solving the singularity problem. By specifying some examples we show that various cosmological singularities may be regularized provided the physical constants evolve in time in an appropriate way.
description: 9 pages, 6 figures, Revtex4-1, an improved version to appear in JCAP
Mariën, M. E.: Oud-Belgie van de eerste landbouwers tot de körnst van Caesar
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Mariën, M. E.: Oud-Belgie van de eerste landbouwers tot de körnst van Caesar. Antwerpen: De Sikkel-Verlag 1952. 528 S. m. 398 Abb. u. 1 Übersichtstabelle. Gzln.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 22 (1953): Nachrichten aus Niedersachsens Urgeschichte
Älterbronzezeitliche Grabhügel bei Wittenwater, Kr. Uelzen
Creators: name: Voss, K. L.
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 32 (1963): Nachrichten aus Niedersachsens Urgeschichte
Iterated fibre sums of algebraic Lefschetz fibrations
Creators: name: Hamilton, M. J. D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57R57, 57R17 (Primary) 14J29 (Secondary)

description: Let M denote the total space of a Lefschetz fibration, obtained by blowing up a Lefschetz pencil on an algebraic surface. We consider the n-fold fibre sum M(n), generalizing the construction of the elliptic surfaces E(n). For a Lefschetz pencil on a simply-connected minimal surface of general type we partially calculate the Seiberg-Witten invariants of the fibre sum M(n) using a formula of Morgan-Szabo-Taubes. As an application we derive an obstruction for self-diffeomorphisms of the boundary of the tubular neighbourhood of a general fibre in M(n) to extend over the complement of the neighbourhood. Similar obstructions are known in the case of elliptic surfaces.
description: 14 pages; to appear in Quart. J. Math
Axionic field theory of (3+1)-dimensional Weyl semi-metals
Creators: name: Goswami, Pallab
name: Tewari, Sumanta
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: From a direct calculation of the anomalous Hall conductivity and an effective electromagnetic action obtained via Fujikawa's chiral rotation technique, we conclude that an axionic field theory with a non-quantized coefficient describes the electromagnetic response of the $(3+1)$-dimensional Weyl semi-metal. The coefficient is proportional to the momentum space separation of the Weyl nodes. Akin to the Chern-Simons field theory of quantum Hall effect, the axion field theory violates gauge invariance in the presence of the boundary, which is cured by the chiral anomaly of the surface states via the Callan-Harvey mechanism. This provides a unique solution for the radiatively induced CPT-odd term in the electromagnetic polarization tensor of the Lorentz violating spinor electrodynamics, where the source of the Lorentz violation is a constant axial four vector term for the Dirac fermion. A direct linear response calculation also establishes anomalous thermal Hall effect and a Wiedemann-Franz law, but thermal Hall conductivity does not directly follow from the well known formula for the gravitational chiral anomaly.
description: 10 pages, 1 figure; replaced by the version published by Phys. Rev. B
Eine Bronze-Situla der frühen Eisenzeit in Luttum, Kr. Verden (Aller)
Creators: name: Schünemann, Detlef
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Asymptotic enumeration of Eulerian circuits for graphs with strong mixing properties
Creators: name: Isaev, Mikhail
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We prove an asymptotic formula for the number of Eulerian circuits for graphs with strong mixing properties and with vertices having even degrees. The exact value is determined up to the multiplicative error $O(n^{-1/2+\varepsilon})$, where $n$ is the number of vertices
Dark-field transmission electron microscopy and the Debye-Waller factor of graphene
Creators: name: Shevitski, Brian
name: Mecklenburg, Matthew
name: Hubbard, William A.
name: White, E. R.
name: Dawson, Ben
name: Lodge, M. S.
name: Ishigami, Masa
name: Regan, B. C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene's structure bears on both the material's electronic properties and fundamental questions about long range order in two-dimensional crystals. We present an analytic calculation of selected area electron diffraction from multi-layer graphene and compare it with data from samples prepared by chemical vapor deposition and mechanical exfoliation. A single layer scatters only 0.5% of the incident electrons, so this kinematical calculation can be considered reliable for five or fewer layers. Dark-field transmission electron micrographs of multi-layer graphene illustrate how knowledge of the diffraction peak intensities can be applied for rapid mapping of thickness, stacking, and grain boundaries. The diffraction peak intensities also depend on the mean-square displacement of atoms from their ideal lattice locations, which is parameterized by a Debye-Waller factor. We measure the Debye-Waller factor of a suspended monolayer of exfoliated graphene and find a result consistent with an estimate based on the Debye model. For laboratory-scale graphene samples, finite size effects are sufficient to stabilize the graphene lattice against melting, indicating that ripples in the third dimension are not necessary.
description: 10 pages, 4 figures
Michel Py, La Liquière (Calvisson, Gard). Village du premier âge du fer en Languedoc oriental
Creators: name: Pauli, Ludwig
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Michel Py, La Liquière (Calvisson, Gard). Village du premier âge du fer en Languedoc oriental. Avec la collaboration de François Py, Patrick Sauzet, Catherine Tendille. Annexes de Philippe Columeau, Jean Erroux, Henri Duday. Revue Archéologique de Narbonnaise, Supplément 11. Éditions du CNRS, Paris 1984. 365 Seiten, 187 Abbildungen und zahlreiche Tabellen.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
Wilhelm Heizmann und Morten Axboe (Herausgeber), die Goldbrakteaten der Völkerwanderungszeit. Auswertung und Neufunde
Creators: name: Möllenberg, Solveig
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Wilhelm Heizmann und Morten Axboe (Herausgeber), die Goldbrakteaten der Völkerwanderungszeit. Auswertung und Neufunde. Ergänzungsbände zum Reallexikon der germanischen Altertumskunde, Band 40. Verlag De Gruyter, Berlin und New York 2011. 1024 Seiten und 102 Tafeln
description: Bonner Jahrbücher, Bd. 210/211.2010/2011(2012): Bonner Jahrbücher