Landau-Zener-Stückelberg-Majorana lasing in circuit quantum electrodynamics

S.N. Shevchenko, P. Neilinger, J. Bogar, M Reshak, G Oelsner, D.S. Karpov, U Hubner, Oleg Astafiev, M. Grajcar, E. Il’ichev

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Abstract

We demonstrate amplification (and attenuation) of a probe signal by a driven two-level quantum system in the Landau-Zener-Stu ̈ckelberg-Majorana regime by means of an experiment, in which a superconducting qubit was strongly coupled to a microwave cavity, in a conventional arrangement of circuit quantum electrodynamics. Two different types of flux qubit, specifically a conventional Josephson junctions qubit and a phase-slip qubit, show similar results, namely, lasing at the working points where amplification takes place. The experimental data are explained by the interaction of the probe signal with Rabi-like oscillations. The latter are created by constructive interference of Landau-Zener-Stu ̈ckelberg-Majorana (LZSM) transitions during the driving period of the qubit. A detailed description of the occurrence of these oscillations and a comparison of obtained data with both analytic and numerical calculations are given.
Original languageEnglish
Article number094519
Pages (from-to)1-9
Number of pages9
JournalPhysical Review B
Volume94
Issue number9
DOIs
Publication statusPublished - 22 Sept 2016

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