A near–quantum-limited Josephson traveling-wave parametric amplifier
Lawrence Berkeley National Laboratory · University of California, Berkeley · +3 more institutions
Abstract
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 several gigahertz with sufficient dynamic range to read out 20 superconducting qubits. To achieve this performance, we introduce a subwavelength resonant phase-matching technique that enables the creation of nonlinear microwave devices with unique dispersion relations. We benchmark the amplifier with weak measurements,…
Citation impact
- FWCI
- 56.09
- Percentile
- 100%
- References
- 38
Authors
8- CMChris MacklinCorresponding
Lawrence Berkeley National Laboratory, University of California, Berkeley
- KPKevin P. O’Brien
University of California, Berkeley
- DHDavid Hover
MIT Lincoln Laboratory, Massachusetts Institute of Technology
- MEMollie E. Schwartz
University of California, Berkeley
- VBVladimir Bolkhovsky
MIT Lincoln Laboratory, Massachusetts Institute of Technology
Topics & keywords
- Amplifier
- Qubit
- High fidelity
- Broadband
- Parametric oscillator
- Josephson effect
- Physics
- Quantum
- Affordable and clean energy