2013/07/09 by A. D. Armour, M. P. Blencowe, E. Brahimi +1 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.111.247001
published as Phys. Rev. Lett. 111, 247001 (2013) · 5 pages, 4 figures
arxiv created 2013/07/09 · arxiv updated 2013/12/12
We analyze the quantum dynamics of a superconducting cavity coupled to a voltage biased Josephson junction. The cavity is strongly excited at resonances where the voltage energy lost by a Cooper pair traversing the circuit is a multiple of the cavity photon energy. We find that the resonances are accompanied by substantial squeezing of the quantum fluctuations of the cavity over a broad range of parameters and are able to identify regimes where the fluctuations in the system take on universal values.