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arXiv 2304.03471quant-phphysics.atom-ph
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非厄米多体朗道-齐纳系统的量子动力学

Quantum dynamics of non-Hermitian many-body Landau-Zener systems

Rajesh K. Malla, Julia Cen, Wilton J. M. Kort-Kamp, Avadh Saxena

AI总结:

本文针对线性驱动的非厄米多体朗道-齐纳系统,发现描述未归一化波函数同时增长的新守恒律,并建立可精确及半经典求解的通用框架,揭示其与分子解离对产生机制的联系。

摘要:

我们建立了一个框架来求解一大类线性驱动的非厄米量子系统。这类模型在厄米情形下通常被称为多态朗道-齐纳模型。非厄米性来源于非绝热能级之间的反厄米耦合。我们发现存在一个新的守恒律,它描述未归一化波函数的同时增长,并且是这类模型所独有的。这些模型在玻色-爱因斯坦凝聚体中具有实际应用,可以描述多组分玻色系统的动力学。该守恒律与一种对产生机制相关,这种机制解释了双原子分子解离为原子的过程。我们为可精确求解和可半经典求解的非厄米朗道-齐纳模型提供了一个通用框架。我们的发现将为显含时间非厄米量子系统中多种多样的涌现现象开辟新的途径。

英文摘要:

We develop a framework to solve a large class of linearly driven non-Hermitian quantum systems. Such a class of models in the Hermitian scenario is commonly known as multi-state Landau-Zener models. The non-hermiticity is due to the anti-Hermitian couplings between the diabatic levels. We find that there exists a new conservation law, unique to this class of models, that describes the simultaneous growth of the unnormalized wavefunctions. These models have practical applications in Bose-Einstein condensates, and they can describe the dynamics of multi-species bosonic systems. The conservation law relates to a pair-production mechanism that explains the dissociation of diatomic molecules into atoms. We provide a general framework for both solvable and semiclassically solvable non-Hermitian Landau-Zener models. Our findings will open new avenues for a number of diverse emergent phenomena in explicitly time-dependent non-Hermitian quantum systems.

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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