1. Time-optimal control of the purification of a qubit in contact with a structured environment
- Author
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J. Fischer, Daniel Basilewitsch, Christiane P. Koch, and Dominique Sugny
- Subjects
Physics ,Speedup ,Geometric analysis ,Strong interaction ,Quantum Physics ,Optimal control ,Time optimal ,Topology ,01 natural sciences ,010305 fluids & plasmas ,Computer Science::Emerging Technologies ,Qubit ,0103 physical sciences ,Thermal ,010306 general physics ,Coherence (physics) - Abstract
We investigate the time-optimal control of the purification of a qubit interacting with a structured environment, consisting of a strongly coupled two-level defect in interaction with a thermal bath. On the basis of a geometric analysis, we show for weak and strong interaction strengths that the optimal control strategy corresponds to a qubit in resonance with the reservoir mode. We investigate under which conditions qubit coherence and correlation between the qubit and the environment can speed up the control process.
- Published
- 2019
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