Direct generation of a multi-transverse mode non-classical state of light

TL;DR

This paper demonstrates an experimental device that directly generates multiple squeezed transverse modes of light simultaneously, advancing the development of scalable multimode quantum resources for quantum information protocols.

Contribution

First experimental demonstration of a multimode optical device producing several squeezed transverse modes at the same frequency.

Findings

Produces three squeezed transverse modes simultaneously

Uses a self-imaging cavity optical parametric oscillator

Potentially scalable for complex quantum protocols

Abstract

Quantum computation and communication protocols require quantum resources which are in the continuous variable regime squeezed and/or quadrature entangled optical modes. To perform more and more complex and robust protocols, one needs sources that can produce in a controlled way highly multimode quantum states of light. One possibility is to mix different single mode quantum resources. Another is to directly use a multimode device, either in the spatial or in the frequency domain. We present here the first experimental demonstration of a device capable of producing simultanuously several squeezed transverse modes of the same frequency and which is potentially scalable. We show that this device, which is an Optical Parametric Oscillator using a self-imaging cavity, produces a multimode quantum resource made of three squeezed transverse modes.