Antibunched photons from inelastic Cooper-pair tunneling

Abstract

We demonstrate theoretically that charge transport across a Josephson junction, voltage-biased through a resistive environment, produces antibunched photons. We develop a continuous-mode description of the emitted radiation field in a semi-infinite transmission line terminated by the Josephson junction. Within a perturbative treatment in powers of the tunneling coupling across the Josephson junction, we capture effects originating in charging dynamics of consecutively tunneling Cooper pairs. We find that within a feasible experimental setup the Coulomb blockade provided by high zero-frequency impedance can be used to create antibunched photons at a very high rate and in a very versatile frequency window ranging from a few GHz to a THz.

5 pages, 3 figures + 4 pages supplemental material

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Cited by in corpus (5)

• Microwave photonics with superconducting quantum circuits
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• Charge-photon transport statistics and short-time correlations in a single quantum dot-resonator system with arbitrarily large coupling parameter
• A self-aligned nano-fabrication process for vertical NbN-MgO-NbN Josephson junctions