A compact 3.5-dB squeezed light source with atomic ensembles

TL;DR

This paper presents a compact squeezed light source using warm Rubidium vapor and diode laser technology, achieving -4dB vacuum squeezing at 795 nm, with potential applications in quantum information and metrology.

Contribution

It introduces a new, compact squeezed light source based on atomic ensembles with practical squeezing performance for quantum technologies.

Findings

Achieved -4dB vacuum squeezing at 795 nm.

Demonstrated a compact setup using diode laser and Rubidium vapor.

Potential applications in quantum repeater, memory, and magnetometry.

Abstract

We reported a compact squeezed light source consisting of an diode laser near resonant on 87Rb optical D1 transition and an warm Rubidium vapor cell. The -4dB vacuum squeezing at 795 nm via nonlinear magneto-optical rotation was observed when applying the magnetic field orthogonal to the propagation direction of the light beam. This compact squeezed light source can be potentially utilized in the quantum information protocols such as quantum repeater and memory, and quantum metrology such as atomic magnetometer.