arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.11284cond-mat.quant-gas
收藏

具有短程两体损耗系统的复接触相互作用

Complex contact interaction for systems with short-range two-body loss

Ce Wang, Chang Liu, Zhe-Yu Shi

AI总结:

本文将接触相互作用概念推广至具有短程两体损耗的系统,证明可用复散射长度表征的零程复接触势等效替代短程两体损耗,并开发了Lindblad主方程中的正则化方法,应用于弱相互作用和两体损耗的玻色-爱因斯坦凝聚体动力学问题。

摘要:

接触相互作用是物理学各领域的基本概念。它用重现相同低能散射参数(即$s$波散射长度)的零程接触势代替详细的短程相互作用,从而简化物理模型。在本工作中,我们将此概念推广到具有短程两体损耗的系统。我们证明,短程两体损耗可有效地由以复散射长度为特征的适当正则化的零程复接触势代替。我们开发了在Lindblad主方程中正则化该势的适当方法,并将其应用于具有弱相互作用和两体损耗的Bose-Einstein凝聚体的动力学问题。

英文摘要:

Contact interaction is a fundamental concept that appears in various areas of physics. It simplifies physical models by replacing the detailed short-range interaction with a zero-range contact potential which reproduces the same low-energy scattering parameter, i.e. the $s$-wave scattering length. In this work, we generalize this concept to a system with short-range two-body loss. We show that the short-range two-body loss can effectively be replaced by a zero-range complex contact potential with proper regularization characterized by a complex scattering length. We develop appropriate ways to regularize this potential in the Lindblad master equation and apply them to the dynamic problem of Bose-Einstein condensate with weak interaction and two-body loss.

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。

↑