Evolution of Relative Entropy of Coherence for Two Qubits States

In this paper, we calculate relative entropy of coherence of the output state of two qubits X states with 5 parameters when one subsystem or two subsystems goes through the amplitude damping channel n times. We find that relative entropy of coherence of the output state decreases as the parameter g...

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Bibliographic Details
Published in:International journal of theoretical physics 2020-03, Vol.59 (3), p.873-883
Main Authors: Song, Yuanfeng, Wang, Yaokun, Tang, Hui, Zhao, Zhixin
Format: Article
Language:English
Subjects:
Amplitudes
Coherence
Damping
Elementary Particles
Entropy
Mathematical and Computational Physics
Parameters
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Subsystems
Theoretical
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Summary:In this paper, we calculate relative entropy of coherence of the output state of two qubits X states with 5 parameters when one subsystem or two subsystems goes through the amplitude damping channel n times. We find that relative entropy of coherence of the output state decreases as the parameter g of the amplitude damping channel continuously changes from zero to one no matter how much n is. The curvature of relative entropy of coherence for the output state loosely increases gradually as n increases. Furthermore when n is larger, frozen coherence can appear as the parameter g of the amplitude damping channel increases.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-019-04373-4