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arXiv · 1603.00245

Landau-Zener-Stückelberg-Majorana lasing in circuit QED

P. Neilinger·S. N. Shevchenko·J. Bogár·M. Rehák·G. Oelsner·D. S. Karpov·U. Hübner·O. 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-Stückelberg-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-Stückelberg-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.

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P. Neilinger, S. N. Shevchenko, J. Bogár, M. Rehák, G. Oelsner, D. S. Karpov, U. Hübner, O. Astafiev, M. Grajcar, E. Il'ichev. 2016-09-23. Landau-Zener-Stückelberg-Majorana lasing in circuit QED. https://doi.org/10.1103/physrevb.94.094519

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