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arXiv 2108.07500cond-mat.str-elcond-mat.mes-hallquant-ph
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利用时间有序束缚对注入建立哈伯德模型的基态

Building ground states of Hubbard model by time-ordered bound-pair injection

K. L. Zhang, Z. Song

摘要:

根据能带理论,正常导体和绝缘体的基态可以通过将电子单独填充到能级中而不受任何限制地获得。当考虑电子-电子相关时,它就失效了。本文研究了哈伯德模型建立基态的动力学过程。它是基于时间有序的量子猝灭的单向跳跃的中央和辅助哈伯德模型。我们发现,存在一组最佳的参数(化学势和对结合能)的辅助系统,它的作用是电子对水库。非厄米量子力学中的特殊点动力学允许电子对从库到中心系统的完美转移,在不同的填充物处获得其基态。时间有序对填充动力学不仅为相关量子态工程提供了一种方法,而且从另一个角度揭示了基态的性质。

英文摘要:

According to energy band theory, ground states of a normal conductor and insulator can be obtained by filling electrons individually into energy levels, without any restrictions. It fails when the electron-electron correlation is taken into account. In this work, we investigate the dynamic process of building ground states of a Hubbard model. It is based on time-ordered quantum quenches for unidirectional hopping across a central and an auxiliary Hubbard model. We find that there exists a set of optimal parameters (chemical potentials and pair binding energy) for the auxiliary system, which takes the role of electron-pair reservoir. The exceptional point dynamics in non-Hermitian quantum mechanics allows the perfect transfer of electron pair from the reservoir to the central system, obtaining its ground states at different fillings. The dynamics of time-ordered pair-filling not only provides a method for correlated quantum state engineering, but also reveals the feature of the ground state in an alternative way.

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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