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arXiv 1401.1986cond-mat.quant-gascond-mat.stat-mech
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二维长程相互作用费米气体的量子猝灭和预热化动力学

Quantum Quench and Prethermalization Dynamics in A Two-Dimensional Fermi Gas with Long-range Interactions

N. Nessi, A. Iucci, M. A. Cazalilla

摘要:

本文研究了二维无自旋费米气体中突然开启长程相互作用的效应。利用费米面玻色化方法得到了中短时间动力学。这允许计算完整的非平衡费米子密度矩阵的时空依赖性,以及淬火后的准粒子残留物的演变。由此发现玻色化预言的渐近态与预热化态是一致的。从玻色化表示,我们明确地构建了广义吉布斯样本描述的预热化状态。还描述了在铒原子的偶极气体中执行相互作用量子猝灭的协议。

英文摘要:

We study the effect of suddenly turning on a long-range interaction in a spinless Fermi gas in two dimensions. The short to intermediate time dynamics is obtained using the method of bosonization of the Fermi surface. This allow to calculate the full space-time dependence of the non-equilibrium fermion density matrix as well as the evolution of the quasiparticle residue after the quench. It is thus found that the asymptotic state predicted by bosonization is consistent with the prethermalized state. From the bosonized representation, we explicitly construct the Generalized Gibbs Ensamble that describes the prethermalized state. A protocol to perform an interaction quantum quench in a dipolar gas of Erbium atoms is also described.

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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