Cavity sideband cooling of the Josephson phase

J. Hammer; M. Aprili; I. Petkovic

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arXiv · 1010.5983

Cavity sideband cooling of the Josephson phase

J. Hammer·M. Aprili·I. Petkovic

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Abstract

An extended Josephson junction intrinsically couples the superconducting current to the microwave cavity in the insulating barrier. We demonstrate that this coupling produces sidebands in the microwave cavity resonances of the junction. By measuring the switching current distribution, we show that microwave radiation at sidebands brings the Josephson phase out of equilibrium. In particular, the effective phase temperature is reduced or enhanced through anti-Stokes and Stokes scattering, respectively. Phase cooling and heating both increase with microwave power.

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J. Hammer, M. Aprili, I. Petkovic. 2010-10-28. Cavity sideband cooling of the Josephson phase. https://arxiv.org/abs/1010.5983

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