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IOP Publishing, New Journal of Physics, 1(17), p. 015010, 2015

DOI: 10.1088/1367-2630/17/1/015010

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Dynamical symmetries and crossovers in a three-spin system with collective dissipation

Journal article published in 2014 by Simon Pigeon ORCID, André Xuereb, Igor Lesanovsky ORCID, Juan P. Garrahan, Gabriele De Chiara, Mauro Paternostro
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We consider the non-equilibrium dynamics of a simple system consisting of interacting spin-$1/2$ particles subjected to a collective damping. The model is close to situations that can be engineered in hybrid electro/opto-mechanical settings. Making use of large-deviation theory, we find a Gallavotti-Cohen symmetry in the dynamics of the system as well as evidence for the coexistence of two dynamical phases with different activity levels. We show that additional damping processes smoothen out this behavior. Our analytical results are backed up by Monte Carlo simulations that reveal the nature of the trajectories contributing to the different dynamical phases. ; Comment: 6 pages, 5 figures