Phase sensitive amplification in a superconducting stripline resonator integrated with a dc-SQUID
Baleegh Abdo, Oren Suchoi, Eran Segev, Oleg Shtempluck, Miles Blencowe, and Eyal Buks
TL;DR
This paper demonstrates a superconducting stripline resonator with a dc-SQUID as a phase-sensitive amplifier, achieving high gain and unique noise behavior, with potential applications in quantum information processing.
Contribution
It introduces a novel superconducting resonator integrated with a dc-SQUID for phase-sensitive amplification with record gains and detailed noise analysis.
Findings
Signal gain of 25 dB and phase modulation of 30 dB achieved
Noise-induced spikes observed near amplification threshold
Parametric amplification yields 38 dB gain in side-band signals
Abstract
We utilize a superconducting stripline resonator containing a dc-SQUID as a strong intermodulation amplifier exhibiting a signal gain of 25 dB and a phase modulation of 30 dB. Studying the system response in the time domain near the intermodulation amplification threshold reveals a unique noise-induced spikes behavior. We account for this response qualitatively via solving numerically the equations of motion for the integrated system. Furthermore, employing this device as a parametric amplifier yields a gain of 38 dB in the generated side-band signal.
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