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  • Publication . Other literature type . Article . Preprint . 2006
    Open Access English
    Authors: 
    Friedrich Hegenbarth; Dušan Repovš;

    The validity of Freedman's disk theorem is known to depend only on the fundamental group. It was conjectured that it fails for nonabelian free fundamental groups. If this were true then surgery theory would work in dimension four. Recently, Krushkal and Lee proved a sur...

  • Open Access English
    Authors: 
    Tomaz Prosen;

    The Lindblad master equation for an arbitrary quadratic system of n fermions is solved explicitly in terms of diagonalization of a 4n x 4n matrix, provided that all Lindblad bath operators are linear in the fermionic variables. The method is applied to the explicit cons...

  • Open Access English
    Authors: 
    Yakubo, K.; Saijo, S.; Koro��ak, D.;

    Using a geographical scale-free network to describe relations between people in a city, we explain both superlinear and sublinear allometric scaling of urban indicators that quantify activities or performances of the city. The urban indicator $Y(N)$ of a city with the p...

  • Publication . Article . Preprint . 2017
    Open Access English
    Authors: 
    Baykal, Cenk; Liebenwein, Lucas; Schwarting, Wilko;

    We present a novel coreset construction algorithm for solving classification tasks using Support Vector Machines (SVMs) in a computationally efficient manner. A coreset is a weighted subset of the original data points that provably approximates the original set. We show...

  • Open Access English
    Authors: 
    Matija Vidmar;

    For each of (i) arbitrary stochastic reset, (ii) deterministic reset with arbitrary period, (iii) reset at arbitrary constant rate, and then in the sense of either (a) first-order stochastic dominance or (b) expectation (i.e. for each of the six possible combinations of...

  • Open Access English
    Authors: 
    Caroline Soubiran; Gérard Jasniewicz; Laurent Chemin; C. Zurbach; N. Brouillet; Pasquale Panuzzo; P. Sartoretti; D. Katz; J. F. Le Campion; O. Marchal; +32 more
    Countries: Belgium, France

    Aims. The Radial Velocity Spectrometer (RVS) on board the ESA satellite mission Gaia has no calibration device. Therefore, the radial velocity zero point needs to be calibrated with stars that are proved to be stable at a level of 300 m/s during the Gaia observations. M...

  • Publication . Preprint . 2006
    Open Access English
    Authors: 
    Fang, F.;

    We report a search for the $h_c$ meson via the decay chain $B^{\pm}\to h_c K^{\pm}$, $\etac \gamma$ with $\eta_c \to K_S^0 K^{\pm} \pi^{\mp}$ and $p\bar{p}$. No significant signals are observed. We obtain upper limits on the branching fractions for $B^{\pm} \to \eta_c\g...

  • Publication . Article . Preprint . 2004
    Open Access English
    Authors: 
    Prosen, Tomaz; Shepelyansky, Dima;
    Publisher: HAL CCSD
    Country: France

    We establish analogy between a microwave ionization of Rydberg atoms and a charge transport through a chaotic quantum dot induced by a monochromatic field in a regime with a potential barrier between dot contacts. We show that the quantum coherence leads to dynamical lo...

  • Publication . Article . Preprint . 2008
    Open Access English
    Authors: 
    Marko Žnidarič; Tomaž Prosen; Iztok Pižorn;

    We study quantum correlations and complexity of simulation, characterized by quantum mutual information and entanglement entropy in operator space respectively, for thermal states in critical, non-critical and quantum chaotic spin chains. A simple general relation betwe...

  • Publication . Article . Preprint . 2019
    Open Access English
    Authors: 
    Xu, Kexiang; Ili��, Aleksandar; Ir��i��, Vesna; Klav��ar, Sandi; Li, Huimin;

    The transmission of a vertex $v$ of a graph $G$ is the sum of distances from $v$ to all the other vertices in $G$. The Wiener complexity of $G$ is the number of different transmissions of its vertices. Similarly, the eccentric complexity of $G$ is defined as the number ...