2015

Caractériser le rayonnement d’un trou noir acoustique dans un condensat de Bose Einstein

Des physiciens viennent de montrer que les techniques expérimentales actuelles devraient permettre de détecter et de caractériser la signature quantique du rayonnement émis par l’horizon d’un trou noir acoustique réalisé dans l’écoulement unidimensionnel d’un condensat de Bose Einstein. L’une des prédictions les plus marquantes du physicien théoricien Stephen Hawking est que les trous noirs gravitationnels […]

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The universality of the Tracy-Widom distribution could originate from a phase transition

Physicists from our lab have recently proposed a mechanism explaining the emergence of the Tracy-Widom distribution in a wide variety of problems in physics and mathematics. They showed that this distribution is associated to the critical behavior of a system of interacting particles, in the vicinity of a third order phase transition. The universality of

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Universal Spectrum of Normal Modes in Low-Temperature Glasses: an Exact Solution

Silvio Franz 1 Giorgio Parisi 2 Pierfrancesco Urbani 3 Francesco Zamponi 4 Proceeding of the national academy of sciences, National Academy of Sciences, 2015, 112, pp.14539 We report an analytical study of the vibrational spectrum of the simplest model of jamming, the soft perceptron. We identify two distinct classes of soft modes. The first kind

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Universal ground-state properties of free fermions in a d-dimensional trap

David S. Dean 1 Pierre Le Doussal 2 Satya N. Majumdar 3 Grégory Schehr 3 EPL, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2015, 112 (6), pp.60001 (1-6). <www.epljournal.org>. <10.1209/0295-5075/112/60001> The ground-state properties of N spinless free fermions in a d-dimensional confining potential are studied. We find that any n-point correlation function has a

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Unidirectional light emission from low-index polymer microlasers

M. SchermerS. Bittner 1 G. SinghC. Ulysse 2 M. Lebental 1, 3 J. Wiersig Applied Physics Letters, American Institute of Physics, 2015, 106 (10), <10.1063/1.4914498> 1. LPQM – Laboratoire de Photonique Quantique et Moléculaire 2. LPN – Laboratoire de photonique et de nanostructures 3. LPTMS – Laboratoire de Physique Théorique et Modèles Statistiques

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Towards an H-theorem for granular gases

Maria Isabel Garcia de Soria 1 Pablo Maynar 1 S Mischler 2 Clément Mouhot 3 Thomas Rey 4, 5 Emmanuel Trizac 6 Journal of Statistical Mechanics: Theory and Experiment, IOP Science, 2015, 2015, <http://iopscience.iop.org/article/10.1088/1742-5468/2015/11/P11009>. <10.1088/1742-5468/2015/11/P11009> The H-theorem, originally derived at the level of Boltzmann non-linear kinetic equation for a dilute gas undergoing elastic collisions, strongly

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