Tracking quasi-classical chaos in ultracold boson gases

Details Tracking quasi-classical chaos in ultracold boson gases Tracking quasi-classical chaos in ultracold boson gases

2008-08-05

arxiv.org/abs/0808.0594v1

Physical Review Letters 101, 14 (2008) 144103

Physics

Quantum Physics

4 pages, revtex4, submitted to PRL

Scientific paper

10.1103/PhysRevLett.101.144103

We study the dynamics of a ultra-cold boson gas in a lattice submitted to a constant force. We track the route of the system towards chaos created by the many-body-induced nonlinearity and show that relevant information can be extracted from an experimentally accessible quantity, the gas mean position. The threshold nonlinearity for the appearance of chaotic behavior is deduced from KAM arguments and agrees with the value obtained by calculating the associated Lyapunov exponent.

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