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arXiv 0812.4387quant-ph
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对称双阱中玻色-爱因斯坦凝聚体的广义纯度和量子相变

Generalized Purity and Quantum Phase Transition for Bose-Einstein condensates in a Symmetric Double Well

Thiago F. Viscondi, K. Furuya, M. C. de Oliveira

摘要:

利用广义纯度研究了对称双势阱中交叉碰撞下双模玻色-爱因斯坦凝聚体的相干损失和Bloch球中Q函数的离域过程.该模型的量子相变由广义纯度作为哈密顿量的适当参数和粒子数(N)的函数来表示。导出了临界参数与N的幂律关系。

英文摘要:

The generalized purity is employed for investigating the process of coherence loss and delocalization of the Q-function in the Bloch sphere of a two-mode Bose-Einstein condensate in a symmetrical double well with cross-collision. Quantum phase transition of the model is signaled by the generalized purity as a function of an appropriate parameter of the Hamiltonian and the number of particles (N). A power law dependence of the critical parameter with N is derived.

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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