Population Inversion Induced by Landau-Zener Transition in a Strongly Driven rf-SQUID

Details Population Inversion Induced by Landau-Zener Transition in a Strongly Driven rf-SQUID Population Inversion Induced by Landau-Zener Transition in a Strongly Driven rf-SQUID

2010-03-10

arxiv.org/abs/1003.2023v1

Appl. Phys. Lett. 94, 102502 (2009)

Physics

Quantum Physics

4pages, 3 figures; Selected as the cover of the March 9 issue of APL

Scientific paper

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.

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