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- W2772767081 abstract "In this work, which is based on our previously derived theoretical framework [1], we apply the truncated Born-Bogoliubov-Green-Kirkwood-Yvon (BBGKY) hierarchy for ultracold bosonic systems with a fixed number of particles to two out-of-equilibrium scenarios, namely tunneling in a double-well potential and an interaction quench in a harmonic trap. The efficient formulation of the theory provided in [1] allows for going to large truncation orders such that the impact of the truncation order on the accuracy of the results can be systematically explored. While the short-time dynamics is found to be excellently described with controllable accuracy, significant deviations occur on a longer time-scale for a sufficiently strong interaction quench or the tunneling scenario. Theses deviations are accompanied by exponential-like instabilities leading to unphysical results. The phenomenology of these instabilities is investigated in detail and we show that the minimal-invasive correction algorithm of the equation of motion as proposed in [1] can indeed stabilize the BBGKY hierarchy truncated at the second order." @default.
- W2772767081 created "2017-12-22" @default.
- W2772767081 creator A5064525551 @default.
- W2772767081 creator A5071047252 @default.
- W2772767081 date "2018-07-30" @default.
- W2772767081 modified "2023-09-26" @default.
- W2772767081 title "Born-Bogoliubov-Green-Kirkwood-Yvon hierarchy for ultracold bosonic systems" @default.
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