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

Jinshuang Jin, Xin-Qi Li, YiJing Yan
2006 Physical Review B  
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
more » ... control in the previous Markovian feedback scheme.
doi:10.1103/physrevb.73.233302 fatcat:tz65vi6mdjeo5j5bufjkssaifm