2016

Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture

J. Ulmanis 1 S. Häfner 1 R. Pires 1 F. Werner 2 D. S. Petrov 3 E. D. Kuhnle 1 M. Weidemüller 4, 1 Physical Review A, American Physical Society, 2016, 93, pp.022707 We study Efimov resonances via three-body loss in an ultracold two-component gas of fermionic $^6$Li and bosonic $^{133}$Cs atoms close to a […]

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Tracer diffusion coefficients in a sheared inelastic Maxwell gas

Vicente Garzó 1 Emmanuel Trizac 2 Journal of Statistical Mechanics: Theory and Experiment, IOP Science, 2016, pp.073206 We study the transport properties of an impurity in a sheared granular gas, in the framework of the Boltzmann equation for inelastic Maxwell models. We investigate here the impact of a nonequilibrium phase transition found in such systems,

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Topological phase transitions in the 1D multichannel Dirac equation with random mass and a random matrix model

Aur Grabsch 1, 2 Christophe Texier 2 Europhys.Lett., 2016, 〈10.1209/0295-5075/116/17004〉 We establish the connection between a multichannel disordered model —the 1D Dirac equation with $N\times N$ matrix random mass— and a random matrix model corresponding to a deformation of the Laguerre ensemble. This allows us to derive exact determinantal representations for the density of states and identify

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Time and temperature-dependent correlation function of an impurity in a one-dimensional Fermi gas as a Fredholm determinant

O. Gamayun 1 Andrei G. Pronko 2 Mikhail B. Zvonarev 3, 4 New Journal of Physics, Institute of Physics: Open Access Journals, 2016, 18, pp.045005 We investigate a free one-dimensional spinless Fermi gas, and the Tonks-Girardeau gas interacting with a single impurity particle of equal mass. We obtain a Fredholm determinant representation for the time-dependent

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Thermalization and many-body localization in systems under dynamic nuclear polarization

Andrea De Luca 1 Inés Rodríguez-Arias 1 Markus Müller 2, 3, 4 Alberto Rosso 1 Physical Review B : Condensed matter and materials physics, American Physical Society, 2016, 94 (1), pp.014203 1. LPTMS – Laboratoire de Physique Théorique et Modèles Statistiques 2. Paul Scherrer Institute 3. The Abdus Salam International Centre for Theoretical Physics 4.

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The simplest model of jamming

Silvio Franz 1 Giorgio Parisi 2 Journal of Physics A: Mathematical and Theoretical, IOP Publishing, 2016, 49, pp.145001 We study a well known machine learning model -the perceptron- as a simple model of jamming of hard objects. We exhibit two regimes: 1) a convex optimisation regime where jamming is hypostatic and non-critical. 2) a non

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The jamming transition in high dimension: an analytical study of the TAP equations and the effective thermodynamic potential

Ada Altieri 1, 2 Silvio Franz 2 Giorgio Parisi 3, 1 Journal of Statistical Mechanics: Theory and Experiment, IOP Science, 2016, 2016 (9), pp.093301 1. SMC/INFM – Department of Physics, Sapienza University of Rome 2. LPTMS – Laboratoire de Physique Théorique et Modèles Statistiques 3. INFN – Istituto Nazionale di Fisica Nucleare [Sezione di Roma

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The free energy of a liquid when viewed as a population of overlapping clusters

Pierre Ronceray 1 Peter Harrowell 2 Molecular Simulation, Taylor & Francis, 2016, 42, pp.1149 The expression of the free energy of a liquid in terms of an explicit decomposition of the particle configurations into local coordination clusters is examined. We argue that the major contribution to the entropy associated with structural fluctuations arises from the

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The excitonic insulator route through a dynamical phase transition induced by an optical pulse

Serguei Brazovskii 1 Natasha Kirova 2 Journal of Experimental and Theoretical Physics (JETP) / Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, MAIK Nauka/Interperiodica, 2016, 149, pp.479 We consider a dynamical phase transition induced by a short optical pulse in a system prone to thermodynamical instability. We address the case of pumping to excitons whose density contributes directly

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