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

Abstract

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.

5 pages, 4 figures

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Cited by in corpus (4)

• Quantum feedback: theory, experiments, and applications
• Nonadiabatic molecular dynamics simulation: An approach based on quantum measurement picture
• Continuous weak measurement and feedback control of a solid-state charge qubit: physical unravelling of non-Lindblad master equation
• Optimal measurement-based feedback control for a single qubit: a candidate protocol