Quantum coherence control of solid-state charge qubit by means of a suboptimal feedback algorithm

Details Quantum coherence control of solid-state charge qubit by means of a suboptimal feedback algorithm Quantum coherence control of solid-state charge qubit by means of a suboptimal feedback algorithm

2006-03-22

arxiv.org/abs/cond-mat/0603573v2

Phys. Rev. B. 73, 233302 (2006)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.73.233302

The quantum coherence control of a solid-state charge qubit is studied by using a suboptimal continuous feedback algorithm within the Bayesian feedback scheme. For the coherent Rabi oscillation, the present algorithm suggests a simple bang-bang control protocol, in which the control parameter is modulated between two values. For the coherence protection of idle state, the present approach is applicable to arbitrary states, including those lying on the equator of the Bloch sphere which are out of control in the previous Markovian feedback scheme.

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