Prethermalization in one-dimensional Bose gases: Description by a stochastic Ornstein-Uhlenbeck process
1 Vienna Center For Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Wien, Austria
2 Ioffe Physico-Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg, Russia
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Revised: 15 January 2013
Published online: 11 March 2013
We experimentally study the relaxation dynamics of a coherently split one-dimensional Bose gas using matterwave interference. Measuring the full probability distributions of interference contrast reveals the prethermalization of the system to a non-thermal steady state. To describe the evolution of noise and correlations we develop a semiclassical effective description that allows us to model the dynamics as a stochastic Ornstein-Uhlenbeck process.
© EDP Sciences, Springer-Verlag, 2013