Key result
A dc voltage-biased Josephson junction embedded in a microwave resonator emits either one or two photons per tunneling Cooper pair, validating the photonic side of dynamical Coulomb blockade.
Demonstrates that under appropriate biasing, the tunneling of a Cooper pair is associated with the simultaneous emission of multiple photons, validating the understanding of dynamical Coulomb blockade based on photon emission.
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Validates photonic model of dynamical Coulomb blockade; leaves open quantum microwave source applications.
Hofheinz et al. (2011) studied this question. Josephson junction embedded in a microwave resonator was evaluated on Photon emission rate and Cooper pair current. A dc voltage-biased Josephson junction embedded in a microwave resonator emits either one or two photons per tunneling Cooper pair, validating the photonic side of dynamical Coulomb blockade.
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