Cavity squeezing by a quantum conductor

TL;DR

This paper demonstrates that electronic conductors driven periodically can induce and optimize quantum squeezing in microwave cavities, advancing solid-state quantum communication technologies.

Contribution

It introduces a method to generate cavity squeezing via parametric driving of quantum conductors, highlighting the role of electronic noise correlators and specific pulse shapes.

Findings

Squeezing is optimized by periodic bias voltage in tunnel junctions.

Leviton pulses can achieve perfect cavity squeezing in quantum dots.

Electronic noise correlators determine the squeezing properties.

Abstract

Hybrid architectures integrating mesoscopic electronic conductors with resonant microwave cavities have a great potential for investigating unexplored regimes of electron-photon coupling. In this context, producing nonclassical squeezed light is a key step towards quantum communication with scalable solid-state devices. Here we show that parametric driving of the electronic conductor induces a squeezed steady state in the cavity. We find that squeezing properties of the cavity are essentially determined by the electronic noise correlators of the quantum conductor. In the case of a tunnel junction, we predict that squeezing is optimized by applying a time-periodic series of quantized $\delta-$peaks in the bias voltage. For an asymmetric quantum dot, we show that a sharp Leviton pulse is able to achieve perfect cavity squeezing.