Non-degenerate pumping of an NbN half-wave resonator parametric amplifier achieves 26 dB peak gain with 0.5 MHz bandwidth, fourfold better gain stability, and 23 dB gain with 6 dB squeezing in phase-sensitive mode.
Zhao,Physics of superconducting travelling-wave para- metric amplifiers, PhD thesis, University of Cambridge
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Non-degenerate pumping of superconducting resonator parametric amplifier with evidence of phase-sensitive amplification
Non-degenerate pumping of an NbN half-wave resonator parametric amplifier achieves 26 dB peak gain with 0.5 MHz bandwidth, fourfold better gain stability, and 23 dB gain with 6 dB squeezing in phase-sensitive mode.