Enhancing nonlocal advantage of quantum coherence in correlated quantum channels

We explore decay behaviors of the nonlocal advantage of quantum coherence (NAQC) for two qubits traversing the phase flap, bit flip, bit-phase flip, and depolarizing channels. For the input Bell and Bell-diagonal states, we showed analytically that the NAQC of the output states can always be noticea...

Full description

Saved in:
Bibliographic Details
Published inQuantum information processing Vol. 19; no. 10
Main Authors Xie, Yu-Xia, Qin, Zhi-Yong
Format Journal Article
LanguageEnglish
Published New York Springer US 01.10.2020
Springer Nature B.V
Subjects
Channels
Coherence
Correlation
Data Structures and Information Theory
Depolarization
Mathematical Physics
Physics
Physics and Astronomy
Quantum Computing
Quantum Information Technology
Quantum phenomena
Quantum Physics
Qubits (quantum computing)
Spintronics
Correlated quantum channel
Quantum coherence
Non-Markovianity
Online AccessGet full text

Cover

More Information
Summary:We explore decay behaviors of the nonlocal advantage of quantum coherence (NAQC) for two qubits traversing the phase flap, bit flip, bit-phase flip, and depolarizing channels. For the input Bell and Bell-diagonal states, we showed analytically that the NAQC of the output states can always be noticeably enhanced due to the correlations between consecutive uses of these quantum channels, and the degree of minimum correlation needed for achieving the NAQC increases with an increase in the decoherence factor. We also explored a colored dephasing channel which enables one to compare the cooperation mechanism of two different origins of memory effects in enhancing the NAQC.
ISSN:1570-0755
1573-1332
DOI:10.1007/s11128-020-02870-8