TY - JOUR
T1 - Pre-management of disentanglement
AU - Qian, Xiao Feng
N1 - Publisher Copyright:
© 2014 IOP Publishing Ltd.
PY - 2014
Y1 - 2014
N2 - We define threshold disentanglement as the level above which entanglement must be maintained for later use and calculate the values of quantum system parameters at t = 0 that will ensure that the threshold is not crossed in a specified time. An important issue is the possibility of non-smooth, typically non-exponential, decay of entanglement into the state of complete disentanglement. Given a specified operation time τ, we determine phase diagrams showing entanglement preservation during the evolution of a generic two-qubit mixed state as a function of selected initial parameters such as concurrence and excitation probabilities. In other words, disentanglement can be pre-managed through these parameters. Three common relaxation processes - amplitude, phase and depolarization - are considered.
AB - We define threshold disentanglement as the level above which entanglement must be maintained for later use and calculate the values of quantum system parameters at t = 0 that will ensure that the threshold is not crossed in a specified time. An important issue is the possibility of non-smooth, typically non-exponential, decay of entanglement into the state of complete disentanglement. Given a specified operation time τ, we determine phase diagrams showing entanglement preservation during the evolution of a generic two-qubit mixed state as a function of selected initial parameters such as concurrence and excitation probabilities. In other words, disentanglement can be pre-managed through these parameters. Three common relaxation processes - amplitude, phase and depolarization - are considered.
KW - disentanglement phases
KW - entanglement control
KW - threshold disentanglement
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U2 - 10.1088/1751-8113/47/26/265304
DO - 10.1088/1751-8113/47/26/265304
M3 - Article
AN - SCOPUS:84937028434
SN - 1751-8113
JO - Journal of Physics A: Mathematical and Theoretical
JF - Journal of Physics A: Mathematical and Theoretical
IS - 26
M1 - 265304
ER -