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Quantum Information Processing

Entanglement entropy distinguishes PT-symmetry and topological phases in a class of non-unitary quantum walks

  • 01-02-2023
Published in:
Authors
Gene M. M. Itable
Francis N. C. Paraan
Published in
Quantum Information Processing | Issue 2/2023

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Abstract

The article delves into the intricate dynamics of entanglement entropy in non-unitary quantum walks, specifically focusing on a model that exhibits PT-symmetry and topological phases. It introduces a method to distinguish these phases by analyzing the long-time behavior of entanglement entropy, revealing that entanglement persists in certain phases while vanishing in others. The study provides insight into the topological properties of non-Hermitian systems and offers a novel approach to characterize different quantum phases experimentally. The findings are supported by phase diagrams that illustrate the relationship between entanglement entropy and the model parameters, highlighting the distinct behaviors of different phases.
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previous article Quantum classifiers for domain adaptation
next article Remote creation of quantum coherence via indefinite causal order
Title
Entanglement entropy distinguishes PT-symmetry and topological phases in a class of non-unitary quantum walks
Authors
Gene M. M. Itable
Francis N. C. Paraan
Publication date
01-02-2023
Publisher
Springer US
Published in
Quantum Information Processing / Issue 2/2023
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-023-03848-y
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