Population inversion induced by Landau-Zener transition in a strongly driven rf superconducting quantum interference device

被引：43

作者：

Sun, Guozhu ^{[1
]}

Wen, Xueda ^{[2
]}

Wang, Yiwen ^{[2
]}

Cong, Shanhua ^{[1
]}

Chen, Jian ^{[1
]}

Kang, Lin ^{[1
]}

Xu, Weiwei ^{[1
]}

Yu, Yang ^{[2
]}

Han, Siyuan ^{[1
,3
]}

Wu, Peiheng ^{[1
]}

机构：

[1] Nanjing Univ, Res Inst Superconductor Elect, Dept Elect Sci & Engn, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Dept Phys, Nanjing 210093, Peoples R China

[3] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 10期

关键词：

multiphoton processes; population inversion; SQUIDs; superconducting microwave devices; TUNNEL-JUNCTIONS; DYNAMICS; STATES;

D O I：

10.1063/1.3093823

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页数：3

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