TY - JOUR
T1 - Counteracting quantum decoherence with optimized disorder in discrete-time quantum walks
AU - Huang, Irwin
AU - Huang, Yu Ping
N1 - Publisher Copyright:
© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2019/9/20
Y1 - 2019/9/20
N2 - Decoherence and disorder are two major difficulties limiting the performance of quantum systems in practical settings. Yet they can potentially counteract each other to partially restore the systems' quantum signatures. We adopt the particle swarm optimization method to find the optimal disorder for mitigating the effects of decoherence in one- and two-dimensional quantum random walks, achieving substantial increase in the mean walking distance for a wide range of decoherence strength. This result suggests a viable approach to constructing practical quantum systems robust against decoherence and disorder.
AB - Decoherence and disorder are two major difficulties limiting the performance of quantum systems in practical settings. Yet they can potentially counteract each other to partially restore the systems' quantum signatures. We adopt the particle swarm optimization method to find the optimal disorder for mitigating the effects of decoherence in one- and two-dimensional quantum random walks, achieving substantial increase in the mean walking distance for a wide range of decoherence strength. This result suggests a viable approach to constructing practical quantum systems robust against decoherence and disorder.
KW - Quantum random walk
KW - decoherence
KW - disorder
KW - particle swarm optimization
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U2 - 10.1080/09500340.2019.1655598
DO - 10.1080/09500340.2019.1655598
M3 - Article
AN - SCOPUS:85071192759
SN - 0950-0340
VL - 66
SP - 1652
EP - 1657
JO - Journal of Modern Optics
JF - Journal of Modern Optics
IS - 16
ER -