We study the role of the beyond mean-field quantum corrections on the tunneling and self-trapping regimes in BEC loaded in the double- well potential.

Quantum 2.0 Conference and ExhibitionJan 1, 20220 citations

arXiv:2406.08895 · The European Physical Journal D

Beyond-mean-field effects in dynamics of BEC in the double-well potential

F. Kh. Abdullaev, R. M. Galimzyanov, Akbar M. Shermakhmatov

Published Sep 1, 2024• 6 citations

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DOI: 10.1140/epjd/s10053-024-00909-4

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We study the role of the beyond mean-field quantum corrections on the tunneling and self-trapping regimes in BEC loaded in the double- well potential.

Quantum 2.0 Conference and ExhibitionJan 1, 20220 citations

For the dynamics of Bose-Einstein condensates (BECs), differences between mean-field (Gross-Pitaevskii) physics and

N

-particle quantum physics often disappear if the BEC becomes larger and larger. In particular, the time scale for which both dynamics agree should thus become larger if the particle number increases. For BECs in a double-well potential, we find both examples for which this is the case and examples for which differences remain even for huge BECs on experimentally realistic short time scales. By using a combination of numerical and analytical methods, we show that the differences remain visible on the level of expectation values even beyond the largest possible numbers realized experimentally for BECs with ultracold atoms.