publications

Excitonic Mechanism of Local Phase Transformations by Optical Pumping

Serguei Brazovskii 1 Natasha Kirova 2 Journal of Superconductivity and Novel Magnetism, Springer Verlag (Germany), 2014, 27, pp.1009 – 1013. <10.1007/s10948-013-2432-9> Transformations of cooperative electronic states by impacts of optical pumping or/and electrostatic doping is a new mainstream in physics of correlated systems. Here we present a semi-phenomenological modelling of spacio-temporal effects in a system […]

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Exact non-equilibrium solutions of the Boltzmann equation under a time-dependent external force

David Guéry-Odelin 1 J. G. Muga 2, 3 M. J. Ruiz-Montero 4 E. Trizac 5 Physical Review Letters, American Physical Society, 2014, 112, pp.180602 We construct a novel class of exact solutions to the Boltzmann equation, in both its classical and quantum formulation, for arbitrary collision laws. When the system is subjected to a specific

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Entanglement Generation Using Discrete Solitons in Coulomb Crystals

H. Landa 1, 2 A. Retzker 3 T. Schaetz 4 B. Reznik 1 Physical Review Letters, American Physical Society, 2014, 113, pp.053001 Laser cooled and trapped ions can crystallize and feature discrete solitons, that are nonlinear, topologically-protected configurations of the Coulomb crystal. Such solitons, as their continuum counterparts, can move within the crystal, while their

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Ensemble inequivalence in a mean-field XY model with ferromagnetic and nematic couplings

Arkady Pikovsky 1, 2 Shamik Gupta 3 Tarcisio N. Teles 4 Fernanda P. C. Benetti 4 Renato Pakter 4 Yan Levin 4 Stefano Ruffo 5 Physical Review E, American Physical Society, 2014, pp.062141 We explore ensemble inequivalence in long-range interacting systems by studying an XY model of classical spins with ferromagnetic and nematic coupling. We

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Dynamics and termination cost of spatially coupled mean-field models

Francesco Caltagirone 1 Silvio Franz 2 Richard Morris 1 Lenka Zdeborová 1 Physical Review E, American Physical Society, 2014, 89, pp.012102 This work is motivated by recent progress in information theory and signal processing where the so-called ‘spatially coupled’ design of systems leads to considerably better performance. We address relevant open questions about spatially coupled

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Dynamical patterns of phase transformations from self-trapping of quantum excitons

Tianyou Yi 1 Natasha Kirova 2 Serguei Brazovskii 1 International school-conference on electronic crystals: ECRYS-2014, Aug 2014, Cargèse, France. 460, pp.73, Physica B: Condensed Matter Phase transitions induced by short optical pulses is a new mainstream in studies of cooperative electronic states. Its special realization in systems with neutral-ionic transformations stands out in a way

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Domain-wall melting in ultracold boson systems with holes and spin-flip defects

Jad C. Halimeh 1 Anton Wöllert 1 Ian P. McCulloch 2 Ulrich Schollwöck 1 Thomas Barthel 1, 3 Physical Review A, American Physical Society, 2014, 89, pp.063603 Quantum magnetism is a fundamental phenomenon of nature. As of late, it has garnered a lot of interest because experiments with ultracold atomic gases in optical lattices can

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Diffusion in periodic, correlated random forcing landscapes

David S Dean 1 Shamik Gupta 2, * Gleb Oshanin 3 Alberto Rosso 2 Grégory Schehr 2 Journal of Physics A: Mathematical and Theoretical, IOP Publishing, 2014, 47 (37), pp.372001. <10.1088/1751-8113/47/37/372001> We study the dynamics of a Brownian particle in a strongly correlated quenched random potential defined as a periodically-extended (with period $L$) finite trajectory

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