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Population inversion induced by Landau--Zener transition in a strongly driven rf superconducting quantum interference device
Sun, Guozhu ; Wen, Xueda ; Wang, Yiwen ; Cong, Shanhua ; Chen, Jian ; Kang, Lin ; Xu, Weiwei ; Yu, Yang ; Han, Siyuan ; Wu, Peiheng
Sun, Guozhu
Wen, Xueda
Wang, Yiwen
Cong, Shanhua
Chen, Jian
Kang, Lin
Xu, Weiwei
Yu, Yang
Han, Siyuan
Wu, Peiheng
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Abstract
Microwave resonances between discrete macroscopically distinct quantum states with single photon and multiphoton absorption are observed in a strongly driven radio frequency superconducting quantum interference device flux qubit. The amplitude of the resonant peaks and dips are modulated by the power of the applied microwave irradiation and a population inversion is generated at low flux bias. These results, which can be addressed with Landau–Zener transition, are useful to develop an alternative means to initialize and manipulate the flux qubit, as well as to do a controllable population inversion used in a micromaser.
Description
This is the published version, also available here: http://dx.doi.org/10.1063/1.3093823.
Date
2009-03-09
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Publisher
American Institute of Physics
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Keywords
Qubits, Excited states, Superconducting transitions, Photons, Superconductivity
Citation
Sun, Guozhu., Wen, Xueda., Wang, Yiwen., Cong, Shanhua., Chen, Jian., Kang, Lin., Xu, Weiwei., Yu, Yang., Han, Siyuan., Wu, Peiheng. "Population inversion induced by Landau--Zener transition in a strongly driven rf superconducting quantum interference device." Appl. Phys. Lett. 94, 102502 (2009); http://dx.doi.org/10.1063/1.3093823.