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Quantum Information Processing

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01-10-2017

Quantum entropy of non-Hermitian entangled systems

Authors: Shi-Yang Zhang, Mao-Fa Fang, Lan Xu

Published in: Quantum Information Processing | Issue 10/2017

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Abstract

Non-Hermitian Hamiltonians are an effective tool for describing the dynamics of open quantum systems. Previous research shows that the restrictions of conventional quantum mechanics may be violated in the non-Hermitian cases. We studied the entropy of a system of entangled qubits governed by a local non-Hermitian Hamiltonian operator. We find that local non-Hermitian operation influences the entropies of the two subsystems equally and simultaneously. This indicates that non-Hermitian operators possess the property of non-locality, which makes information exchange possible between subsystems. These information exchanges reduce the uncertainty of outcomes associated with two incompatible quantum measurements.

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Title: Quantum entropy of non-Hermitian entangled systems
Authors: Shi-Yang Zhang
Mao-Fa Fang
Lan Xu
Publication date: 01-10-2017
Publisher: Springer US
Published in: Quantum Information Processing / Issue 10/2017
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-017-1685-9

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