Jun Jing, Lian-Ao Wu, J. Q. You, Ting Yu
Protection of quantum states in a noisy environment is essential for reliable
quantum information processing. In this Letter, through a sequence of
unoptimized periodical rectangular pulses we show that beyond perturbation,
dynamical decoupling can be a powerful tool for the control of fidelity and
entanglement of the open system in a non-Markovian bath. With this
non-perturbative approach, we have found, for the first time, the threshold and
pulse parameter regions in which the non-idealized pulses are effective in
controlling quantum coherence.
View original:
http://arxiv.org/abs/1202.5056
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