Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 52: Ultracold atoms, ions and BEC V (with A)

Q 52.6: Vortrag

Donnerstag, 20. März 2014, 17:45–18:00, BEBEL SR140/142

Heat transport through the isotropic Lipkin-Meshkov-Glick model — •Georg Engelhardt, Victor Manuel Bastidas, and Tobias Brandes — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

The Lipkin-Meshkov-Glick (LMG) model is a paradigmatic instance for a system exhibiting a quantum phase transition. We consider the isotropic LMG model coupled to two heat baths at different temperatures. We analytically calculate the heat current and the heat conductivity through the system using the master equation in Born-Markov-secular approximation. In the thermodynamic limit, we find that the heat conductivity vanishes in the symmetric phase while it is finite in the symmetry-broken phase.