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Quantum 2.0 Conference and Exhibition

Influence of quantum fluctuations on tunneling of BEC in a double-well potential

F. Kh. Abdullaev, Akbar Shermaxmatov

Published Jan 1, 2022• 0 citations
Publisher

Abstract

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.
DOI
10.1364/quantum.2022.qw2a.34

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Abstract In this paper, we study the influence of quantum fluctuations (QFs) on the macroscopic quantum tunneling and self-trapping (ST) of a two-component Bose–Einstein condensate in a double-well trap. QFs are described by the Lee–Huang–Yang (LHY) term in the modified Gross–Pitaevskii (GP) equation. Employing the modified GP equation in a scalar approximation, we derive a dimer model using a two-mode approximation. The frequencies of Josephson oscillations and ST conditions under QFs are found analytically and proven by numerical simulations of the modified GP equation. The tunneling and localization phenomena are also investigated for the case of the LHY fluid loaded in a double-well potential.
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