Continuous quantum measurement in spin environments

D Xie, AM Wang - International Journal of Quantum Information, 2015 - World Scientific
D Xie, AM Wang
International Journal of Quantum Information, 2015World Scientific
We derive a stochastic master equation (SME) which describes the decoherence dynamics
of a system in spin environments conditioned on the measurement record. Markovian and
non-Markovian nature of environment can be revealed by a spectroscopy method based on
weak continuous quantum measurement. On account of that correlated environments can
lead to a non-local open system which exhibits strong non-Markovian effects although the
local dynamics are Markovian, the spectroscopy method can be used to demonstrate that …
We derive a stochastic master equation (SME) which describes the decoherence dynamics of a system in spin environments conditioned on the measurement record. Markovian and non-Markovian nature of environment can be revealed by a spectroscopy method based on weak continuous quantum measurement. On account of that correlated environments can lead to a non-local open system which exhibits strong non-Markovian effects although the local dynamics are Markovian, the spectroscopy method can be used to demonstrate that there is correlation between two environments.
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