Universal routes to spontaneous PT-symmetry breaking in non-hermitian quantum systems

Schomerus, Henning (2011) Universal routes to spontaneous PT-symmetry breaking in non-hermitian quantum systems. Physical review a, 83 (3). ISSN 1050-2947

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Abstract

PT-symmetric systems can have a real spectrum even when their Hamiltonian is non-Hermitian, but develop a complex spectrum when the degree of non-Hermiticity increases. Here we utilize random-matrix theory to show that this spontaneous PT-symmetry breaking can occur via two distinct mechanisms, whose predominance is associated to different universality classes. Present optical experiments fall into the orthogonal class, where symmetry-induced level crossings render the characteristic absorption rate independent of the coupling strength between the symmetry-related parts of the system.

Item Type:
Journal Article
Journal or Publication Title:
Physical review a
Additional Information:
©2011 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
ID Code:
51670
Deposited By:
Deposited On:
30 Nov 2011 09:52
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Oct 2020 03:23