A Josephson Junction based SPDT switch

RF microwave switches are useful tools in cryogenic experiments, allowing for multiple experiments to be connected to a single cryogenic measurement chain. However, these switches dissipate a substantial amount of heat, preventing fast switching. Josephson junction (JJ) are a promising avenue for realizing millikelvin microwave switching[1,2]. We present a JJ based single-pole-double throw (SPDT) switch that has fast switching time, no heat dissipation, large on/off contrast, and works over a wide bandwidth. The switch can be used for real-time switching between experiments, routing single photons, or even generating entanglement. We will describe the design of the switch and present experimental characterization of its performance. \newline [1]. Benjamin J. Chapman, Bradley A. Moores, Eric I. Rosenthal, Joseph Kerckhoff, K. W. Lehnert \emph{General purpose multiplexing device for cryogenic microwave systems}, Appl. Phys. Lett. 108, 222602 (2016) \newline [2]. O. Naaman, J. A. Strong, D. G. Ferguson, J. Egan, N. Bailey, R. T. Hinkey \emph{Josephson junction microwave modulators for qubit control}, arXiv:1610.07987v1