Quantum dynamics of a microwave driven superconducting phase qubit coupled to a two-level system

Guozhu Sun; Xueda Wen; Bo Mao; Zhongyuan Zhou; Yang Yu; Peiheng Wu; Siyuan Han

doi:10.1103/PhysRevB.82.132501

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Quantum dynamics of a microwave driven superconducting phase qubit coupled to a two-level system

Guozhu Sun, Xueda Wen, Bo Mao, Zhongyuan Zhou, Yang Yu, Peiheng Wu, Siyuan Han

DOI 10.1103/PhysRevB.82.132501 · Physical Review B

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Abstract

We present an analytical and comprehensive description of the quantum dynamics of a microwave resonantly driven superconducting phase qubit coupled to a microscopic two-level system (TLS), covering a wide range of the external microwave field strength. Our model predicts several interesting phenomena in such an ac driven four-level bipartite system including anomalous Rabi oscillations, high-contrast beatings of Rabi oscillations, and extraordinary two-photon transitions. Our experimental results in a coupled qubit-TLS system agree quantitatively very well with the predictions of the theoretical model.