Shaping an Itinerant Quantum Field by Dissipation

TL;DR

This paper presents a method to generate a tunable multimode squeezed vacuum in circuit QED systems by inducing sidebands and using dissipation, without needing strong coupling or discrete modes.

Contribution

It introduces a novel approach to produce multimode squeezed light via dissipation and sideband engineering in a continuum of modes, applicable in circuit QED.

Findings

Achieves photon field cooling to a squeezed vacuum state.

Does not require strong coupling regime.

Applicable to continuum of propagating modes.

Abstract

We show that inducing sidebands in the emission of a single emitter into a one dimensional waveguide, together with a dissipative re-pumping process, a photon field is cooled down to a squeezed vacuum. Our method does not require to be in the strong coupling regime, works with a continuum of propagating field modes and it may lead to sources of tunable multimode squeezed light in circuit QED systems.