Photon cross-correlations emitted by a Josephson junction in two microwave cavities

Abstract

We study a voltage biased Josephson junction coupled to two resonators of incommensurate frequencies. Using a density approach to analyze the cavity fields and an input-output description to analyze the emitted photonic fluxes and their correlation functions, we have shown, both for infinite and finite bandwidth detectors, that the emitted radiation is non-classical in the sense that the correlators violates Cauchy-Schwarz inequalities. We have also studied the time dependence of the photonic correlations and showed that their line-width becomes narrower with the increase of the emission rate approaching from below the threshold limit.

9 pages, 5 figures

References in corpus (4)

• Dynamical Coulomb Blockade of Shot Noise
• Josephson photonics with a two-mode superconducting circuit
• Introduction of a DC Bias into a High-Q Superconducting Microwave Cavity
• Experimental Test of the Dynamical Coulomb Blockade Theory for Short Coherent Conductors

Cited by in corpus (5)

• Autonomous Quantum Refrigerator in a Circuit-QED Architecture Based on a Josephson Junction
• Generating entangled quantum microwaves in a Josephson-photonics device
• Charge-photon transport statistics and short-time correlations in a single quantum dot-resonator system with arbitrarily large coupling parameter
• Photon-pair blockade in a Josephson-photonics circuit with two nondegenerate microwave resonators
• Josephson Photonics with Simultaneous Resonances