非厄米哈密顿量的倏逝波近似

Evanescent Wave Approximation for Non-Hermitian Hamiltonians.

作者信息

Militello Benedetto, Napoli Anna

机构信息

Università degli Studi di Palermo, Dipartimento di Fisica e Chimica-Emilio Segrè, Via Archirafi 36, I-90123 Palermo, Italy.

INFN Sezione di Catania, Via Santa Sofia 64, I-95123 Catania, Italy.

出版信息

Entropy (Basel). 2020 Jun 4;22(6):624. doi: 10.3390/e22060624.

DOI:10.3390/e22060624

PMID:33286396

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7517160/

Abstract

The counterpart of the rotating wave approximation for non-Hermitian Hamiltonians is considered, which allows for the derivation of a suitable effective Hamiltonian for systems with some states undergoing decay. In the limit of very high decay rates, on the basis of this effective description we can predict the occurrence of a quantum Zeno dynamics, which is interpreted as the removal of some coupling terms and the vanishing of an operatorial pseudo-Lamb shift.

摘要

我们考虑了非厄米哈密顿量的旋转波近似的对应物，这使得我们能够为一些状态发生衰变的系统推导合适的有效哈密顿量。在非常高的衰变率极限下，基于这种有效描述，我们可以预测量子芝诺动力学的出现，这被解释为一些耦合项的消除和算符伪兰姆移位的消失。