Coherent tunneling of collective excitation of Bose-Einstein condensate in a double-well potential

Yaojun Ying; Haoyu Wang; Ming Zhang; Haibin Li

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arXiv · 2506.15104

Coherent tunneling of collective excitation of Bose-Einstein condensate in a double-well potential

Yaojun Ying·Haoyu Wang·Ming Zhang·Haibin Li

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Abstract

The Josephson effect can be observed in a Bose-Einstein condensate in a double-well potential, which is attributed to the tunneling of bosons between two wells. We propose a multi-mode theory to investigate the dynamics of local excitations in a one-dimensional condensate in a double-well potential. We show that the system can be described by two independent two-mode models. The Josephson oscillation and the self-trapping of local collective excitations are predicted analytically and confirmed by numerical simulation.

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Yaojun Ying, Haoyu Wang, Ming Zhang, Haibin Li. 2025-06-18. Coherent tunneling of collective excitation of Bose-Einstein condensate in a double-well potential. https://arxiv.org/abs/2506.15104

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