Josephson Parametric Reflection Amplifier with Integrated Directionality

Controlling the dynamic range of a Josephson parametric amplifier

*Correspondence: [email protected] Department of Physics, ETH Zürich, Zürich, 8093, Switzerland Abstract One of the central challenges in the development of parametric amplifiers is the control of the dynamic range relative to its gain and bandwidth, which typically limits quantum limited amplification to signals which contain only a few photons per inverse bandwidth. Here, we discuss the c...

A near-quantum-limited Josephson traveling-wave parametric amplifier.

Detecting single-photon level signals—carriers of both classical and quantum information—is particularly challenging for low-energy microwave frequency excitations. Here we introduce a superconducting amplifier based on a Josephson junction transmission line. Unlike current standing-wave parametric amplifiers, this traveling wave architecture robustly achieves high gain over a bandwidth of seve...

Strong environmental coupling in a Josephson parametric amplifier

J. Y. Mutus, T. C. White, R. Barends, Yu Chen, Z. Chen, B. Chiaro, A. Dunsworth, E. Jeffrey, J. Kelly, A. Megrant, C. Neill, P. J. J. O’Malley, P. Roushan, D. Sank, A. Vainsencher, J. Wenner, K. M. Sundqvist, A. N. Cleland, and John M. Martinis Department of Physics, University of California, Santa Barbara, California 93106-9530, USA Department of Materials, University of California, Santa Barb...

A low-noise series-array Josephson junction parametric amplifier

We have obtained parametric gain at 19 GHz from a distributed Josephson junction parametric amplifier whose active gain medium consists of a series array of 1000 Josephson junctions embedded in a coplanar waveguide. When cooled to 1.7 K the amplifier provides 16 dB gain in a mode where the internally generated double sideband noise referred to input is 0.560.1 K. This noise is consistent with N...

Wireless Josephson amplifier