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quant-ph2013★ 49 cited
Investigation of nonlinear effects in Josephson parametric oscillators used in circuit QED
Philip Krantz, Yarema Reshitnyk, Waltraut Wustmann +6
We experimentally study the behavior of a parametrically pumped nonlinear oscillator, which is based on a superconducting λ/4 resonator, and is terminated by a flux-tunable SQUID.…
cond-mat.supr-con2013★ 27 cited
The pumpistor: a linearized model of a flux-pumped SQUID for use as a negative-resistance parametric amplifier
K. M. Sundqvist, S. Kintaş, M. Simoen +4
We describe a circuit model for a flux-driven SQUID. This is useful for developing insight into how these devices perform as active elements in parametric amplifiers. The key conce…