Dressed Zeno effect in circuit quantum electrodynamics

作者：Li Hai Chao^*; Ge Guo Qin; Feng Shun Bin

来源：Physical Review A, 2014, 89(6): 062119.

DOI：10.1103/PhysRevA.89.062119

We present a theoretical study of the quantum Zeno effect in a driven superconducting charge qubit strongly and ultrastrongly coupled to a transmission line resonator. Using the dressed-state approach, we predict the different dynamics behaviors of the dressed qubit subjected to two opposite projection measurements. We show that, for very frequent measurements, the survival probability of the initial state is of exponential form and the Zeno time of the dressed qubit can be several orders of magnitude longer than that of the bare qubit. For slowly repeated measurements, the detuning of the driving field has significant impact on the measurement dynamics, and by choosing appropriate parameters for the dressed qubit, the Zeno effect can occur in the nonresonant coupling case. Such a Zeno effect is excluded from a usual two-level system.

• 出版日期2014-6-30
• 单位华中科技大学