Short-Time Decoherence of Solid-State Qubit at Optimal Operation Points
Zhao Xu, Xian-Ting Liang · Communications in Theoretical Physics · 2005
We investigate the short-time decoherence of a solid-state qubit under Ohmic noise at optimal operation points. The decoherence is analyzed by maximum norm of the deviation density operator. It is shown that at the temperature T = 3 mK, the loss of the fidelity due to decoherence is much smaller than the DiVincenzo low decoherence criterion, which means that the model may be an optimal candidate of qubit for quantum computation.