TY - JOUR
T1 - Deterministic quantum controlled-PHASE gates based on non-Markovian environments
AU - Zhang, Rui
AU - Chen, Tian
AU - Wang, Xiang Bin
N1 - Publisher Copyright:
© 2017 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft.
PY - 2017/12
Y1 - 2017/12
N2 - We study the realization of the quantum controlled-PHASE gate in an atom-cavity system beyond the Markovian approximation. The general description of the dynamics for the atom-cavity system without any approximation is presented. When the spectral density of the reservoir has the Lorentz form, by making use of the memory backflow from the reservoir, we can always construct the deterministic quantum controlled-PHASE gate between a photon and an atom, no matter the atom-cavity coupling strength is weak or strong. While, the phase shift in the output pulse hinders the implementation of quantum controlled-PHASE gates in the sub-Ohmic, Ohmic or super-Ohmic reservoirs.
AB - We study the realization of the quantum controlled-PHASE gate in an atom-cavity system beyond the Markovian approximation. The general description of the dynamics for the atom-cavity system without any approximation is presented. When the spectral density of the reservoir has the Lorentz form, by making use of the memory backflow from the reservoir, we can always construct the deterministic quantum controlled-PHASE gate between a photon and an atom, no matter the atom-cavity coupling strength is weak or strong. While, the phase shift in the output pulse hinders the implementation of quantum controlled-PHASE gates in the sub-Ohmic, Ohmic or super-Ohmic reservoirs.
KW - cavity quantum electrodynamics
KW - controlled-PHASE gates
KW - non-Markovian quantum open systems
UR - https://www.scopus.com/pages/publications/85039781859
U2 - 10.1088/1367-2630/aa9510
DO - 10.1088/1367-2630/aa9510
M3 - Article
AN - SCOPUS:85039781859
SN - 1367-2630
VL - 19
JO - New Journal of Physics
JF - New Journal of Physics
IS - 12
M1 - 123001
ER -