Quantum Properties of the radiation emitted by a conductor in the Coulomb Blockade Regime

TL;DR

This paper develops a formalism to analyze radiation emitted by a quantum conductor in the Coulomb blockade regime, revealing how environmental non-linearity can produce strongly squeezed, non-classical electromagnetic radiation.

Contribution

It introduces an input-output formalism for a tunnel junction in a strongly coupled environment, demonstrating the generation of non-classical radiation through electronic transport.

Findings

Strongly squeezed radiation generated by the junction

Environmental design influences quantum radiation properties

Interaction enables simple sources of non-classical light

Abstract

We present an input-output formalism describing a tunnel junction strongly coupled to its electromagnetic environment. We exploit it in order to investigate the dynamics of the radiation being emitted and scattered by the junction. We find that the non-linearity imprinted in the electronic transport by a properly designed environment generates strongly squeezed radiation. Our results show that the interaction between a quantum conductor and electromagnetic fields can be exploited as a resource to design simple sources of non-classical radiation.