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arXiv 2211.03386cond-mat.quant-gas
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一维晶格中玻色-爱因斯坦凝聚体的粒子间歇性发射

Intermittent emission of particles from a Bose-Einstein condensate in a one-dimensional lattice

L. Q. Lai, Z. Li, Q. H. Liu, Y. B. Yu

备注：
8 pages, 11 figures
发表信息：
Ann. Phys. (Berlin) 536, 2300365 (2024)
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AI总结：

本文研究一维晶格中相互作用周期性调制的玻色-爱因斯坦凝聚体的粒子发射，发现发射呈间歇性而非连续，并揭示间歇性实为系统积累阶段。

摘要：

我们研究了一维晶格中相互作用被周期性调制的玻色-爱因斯坦凝聚体的粒子发射。在导致离散模式不稳定性的微扰分析框架内，我们获得了系统可以发射大粒子射流的主要区域，并发现发射具有明显的间歇性而非连续性。被俘获粒子的时间演化呈现出阶梯状衰减，更大的驱动强度会引发更显著的间歇性。我们进一步阐明了激发过程的动力学，并证明间歇性并非真正的暂停，而是代表系统的积累阶段。该理论框架可以推广到具有类似构型和耦合的多格点系统的探索中，并为其他基础非平衡问题提供新的见解。

英文摘要：

We investigate particle emission from a Bose-Einstein condensate with periodically modulated interactions in a one-dimensional lattice. Within perturbative analysis, which leads to instabilities for discrete modes, we obtain the main regimes where the system can emit a large particle jet, and find that the emission is distinctly intermittent rather than continuous. The time evolution of the trapped particles exhibits a stair-like decay, and a larger drive induces a more significant intermittency. We further shed light on the dynamics of the stimulating process, and demonstrate that instead of a real suspension, the intermittency represents a build-up stage of the system. The theoretical framework might be generalized to the explorations on multiple-site systems with analogous configurations and couplings, and offer new insights into other fundamental nonequilibrium problems.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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