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arXiv · 1501.01543

Two-photon lasing by a superconducting qubit

P. Neilinger·M. Rehák·M. Grajcar·G. Oelsner·U. Hübner·E. Il'ichev
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Abstract

We study the response of a magnetic-field-driven superconducting qubit strongly coupled to a superconducting coplanar waveguide resonator. We observed a strong amplification/damping of a probing signal at different resonance points corresponding to a one and two-photon emission/absorption. The sign of the detuning between the qubit frequency and the probe determines whether amplification or damping is observed. The larger blue detuned driving leads to two-photon lasing while the larger red detuning cools the resonator. Our experimental results are in good agreement with the theoretical model of qubit lasing and cooling at the Rabi frequency.

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P. Neilinger, M. Rehák, M. Grajcar, G. Oelsner, U. Hübner, E. Il'ichev. 2015-01-07. Two-photon lasing by a superconducting qubit. https://doi.org/10.1103/physrevb.91.104516

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