Optimal control of population transfer in Markovian open quantum systems

Details Optimal control of population transfer in Markovian open quantum systems Optimal control of population transfer in Markovian open quantum systems

2010-04-24

arxiv.org/abs/1004.4301v2

Physics

Quantum Physics

19 pages, 10 figures

Scientific paper

There has long been interest to control the transfer of population between specified quantum states. Recent work has optimized the control law for closed system population transfer by using a gradient ascent pulse engineer- ing algorithm [1]. Here, a spin-boson model consisting of two-level atoms which interact with the dissipative environment, is investigated. With opti- mal control, the quantum system can invert the populations of the quantum logic states. The temperature plays an important role in controlling popula- tion transfer. At low temperatures the control has active performance, while at high temperatures it has less erect. We also analyze the decoherence be- havior of open quantum systems with optimal population transfer control, and we find that these controls can prolong the coherence time. We hope that active optimal control can help quantum solid-state-based engineering.

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