Prethermalization in one-dimensional Bose gases: Description by a stochastic Ornstein-Uhlenbeck process
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- Langen, T., Gring, M., Kuhnert, M. et al. Eur. Phys. J. Spec. Top. (2013) 217: 43. doi:10.1140/epjst/e2013-01752-0
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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.