Interdisciplinary Information Sciences
Online ISSN : 1347-6157
Print ISSN : 1340-9050
Quantum Simulation and Quantum Walks
Effects of Disorder on Non-unitary PT Symmetric Quantum Walks
Ken MOCHIZUKIHideaki OBUSE
Author information
JOURNALS FREE ACCESS

Volume 23 (2017) Issue 1 Pages 95-103

Details
Download PDF (830K) Contact us
Abstract

PT symmetry, namely, a combined parity and time-reversal symmetry can make non-unitary quantum walks exhibit entirely real eigenenergy. However, it is known that the concept of PT symmetry can be generalized and an arbitrary anti-unitary symmetry has a possibility to substitute PT symmetry. The aim of the present work is to seek such non-unitary quantum walks with generalized PT symmetry by focusing on effects of spatially random disorder which breaks PT symmetry. We numerically find non-unitary quantum walks whose quasi-energy is entirely real despite PT symmetry is broken.

Information related to the author
© 2017 by the Graduate School of Information Sciences (GSIS), Tohoku University
Previous article Next article

Recently visited articles
feedback
Top