Measurements of fourth-order connected correlation functions reveal non-Gaussian relative-phase fluctuations in tunnel-coupled 1D Bose gases, consistent with sine-Gordon theory, and a first observation of Gaussification after decoupling.
Relaxation to gaussian and generalized Gibbs states in systems of particles with quadratic hamiltonians
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abstract
We present an elementary, general, and semi-quantitative description of relaxation to gaussian and generalized Gibbs states in lattice models of fermions or bosons with quadratic hamiltonians. Our arguments apply to arbitrary initial states that satisfy a mild condition on clustering of correlations. We also show that similar arguments can be used to understand relaxation (or its absence) in systems with time-dependent quadratic hamiltonians, and provide a semi-quantitative description of relaxation in quadratic periodically driven (Floquet) systems.
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cond-mat.quant-gas 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Correlations and dynamics of tunnel-coupled one-dimensional Bose gases
Measurements of fourth-order connected correlation functions reveal non-Gaussian relative-phase fluctuations in tunnel-coupled 1D Bose gases, consistent with sine-Gordon theory, and a first observation of Gaussification after decoupling.