arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1504.05441cond-mat.quant-gas
收藏

探测双模玻色-爱因斯坦凝聚体中的两粒子交换过程

Probing two-particle exchange processes in two-mode Bose-Einstein condensates

Luis Benet, Diego Espitia, Daniel Sahagún

摘要:

考虑包含两粒子隧穿项的玻色-哈伯德模型,研究了Fock区双模玻色-爱因斯坦凝聚体初始相干态的保真度衰减及其冻结.通过使用线性响应理论,我们发现作为粒子数的函数的保真度的标度性质,证明了存在的两个粒子的模式交换时,非简并条件得到满足。调谐两个模式的能量差,以区分两个粒子模式交换条款的存在,通过某些奇异性的外观。数值结果证实了我们的发现。实验验证我们的研究结果可以改善冷原子干涉。

英文摘要:

We study the fidelity decay and its freeze for an initial coherent state of two-mode Bose-Einstein condensates in the Fock regime considering a Bose-Hubbard model that includes two-particle tunneling terms. By using linear-response theory we find scaling properties of the fidelity as a function of the particle number that prove the existence of two-particle mode-exchange when a non-degeneracy condition is fulfilled. Tuning the energy difference of the two modes serves to distinguish the presence of two-particle mode-exchange terms through the appearance of certain singularities. Numerical results confirm our findings. Experimental verification of our findings could improve cold atom interferometry.

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。

↑