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arXiv 0905.1398cond-mat.quant-gascond-mat.str-el
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莫特绝缘体的动力学自稳定性:非平衡冷费米子气体的密度和纠缠熵的时间演化

Dynamical self-stabilization of the Mott insulator: Time evolution of the density and entanglement entropy of out-of-equilibrium cold fermion gases

Daniel Karlsson, Claudio Verdozzi, Mariana M. Odashima, Klaus Capelle

摘要:

通过计算超冷费米子原子气体从光阱中释放时的时空分辨密度和熵分布,数值研究了非平衡莫特绝缘体的时间演化.对于绝热,温和和突然关闭的捕获电位,的莫特绝缘体的平衡动力学被发现是深刻的带绝缘体和金属相的不同,显示出自诱导的稳定性,是强大的密度,系统的大小和相互作用强度的范围内。纠缠熵和相变之间的联系,已知的平衡的情况下,被发现扩展到平衡制度。最后分析了系统的长期行为与热化极限之间的关系。

英文摘要:

The time evolution of the out-of-equilibrium Mott insulator is investigated numerically through calculations of space-time resolved density and entropy profiles resulting from the release of a gas of ultracold fermionic atoms from an optical trap. For adiabatic, moderate and sudden switching-off of the trapping potential, the out-of-equilibrium dynamics of the Mott insulator is found to differ profoundly from that of the band insulator and the metallic phase, displaying a self-induced stability that is robust within a wide range of densities, system sizes and interaction strengths. The connection between the entanglement entropy and changes of phase, known for equilibrium situations, is found to extend to the out-of-equilibrium regime. Finally, the relation between the system's long time behavior and the thermalization limit is analyzed.

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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