期刊
PHYSICAL REVIEW A
卷 104, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.104.033308
关键词
-
资金
- NSF [PHY-2110250]
- China Scholarship Council [201906130092]
This study focuses on particle emission from a Bose-Einstein condensate trapped in a one-dimensional lattice when the interaction strength is modulated. In addition to the well-studied pair emission, single-particle emission is also observed. Using linear response, closed-form expressions for single-particle emission rates are obtained and pair emission rates are reduced to one-dimensional integrals. The full nonlinear theory of single-particle emission is then simplified to a single variable integrodifferential equation, which is numerically solved.
Motivated by recent experiments, we calculate particle emission from a Bose-Einstein condensate trapped in a single deep well of a one-dimensional lattice when the interaction strength is modulated. In addition to pair emission, which has been widely studied, we observe single-particle emission. Within linear response, we are able to write closed-form expressions for the single-particle emission rates and reduce the pair emission rates to one-dimensional integrals. The full nonlinear theory of single-particle emission is reduced to a single variable integrodifferential equation, which we numerically solve.
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