Dynamical generation of geometric squeezing in interacting Bose-Einstein condensates

• URL: http://arxiv.org/abs/2508.04126v1
• Date: Wed, 06 Aug 2025 06:50:03 GMT
• Title: Dynamical generation of geometric squeezing in interacting Bose-Einstein condensates
• Authors: Li Chen, Fei Zhu, Zheng Tang, Liang Zeng, Jae Joon Lee, Han Pu,
• Abstract summary: We study the geometrically squeezed state of Bose-Einstein condensates (BECs)<n>For interacting BECs with two-body collisions, a similar quench only results in quantum fluctuations oscillating periodically without squeezing.<n>By strategically breaking the stability criteria, we propose a dynamical approach for generating squeezing that can exponentially suppress quantum fluctuations in a relatively short time.
• Score: 21.448766267828294
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: When the rotating frequency of a non-interacting Bose-Einstein condensate (BEC) confined in a weak anisotropic harmonic potential is suddenly quenched to its trapping frequency, the condensate evolves from its ground state to a single-mode squeezed state with exponentially growing quantum fluctuation anisotropy. Such a squeezed state is called the geometrically squeezed state. However, for interacting BECs with two-body collisions, a similar quench only results in quantum fluctuations oscillating periodically without squeezing. In this work, we identify superfluid stability as the key factor behind this non-squeezing phenomenon, with the periodic oscillations arising from collective excitations of a stable collective excitation mode. By strategically breaking the stability criteria, we propose a dynamical approach for generating squeezing that can exponentially suppress quantum fluctuations in a relatively short time, surpassing the efficiency of existing experimental preparation schemes.

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