Squeezed lasing

TL;DR

This paper proposes a new type of laser called a squeezed laser, which produces light with both laser-like spectral properties and quantum squeezing, enabling advanced applications in precision measurement.

Contribution

It introduces the concept of a squeezed laser, detailing its theoretical foundation and a feasible implementation using parametric driving and dissipative stabilization.

Findings

Squeezed laser emits light with both spectral purity and photon squeezing.

The proposed setup can be implemented in optical systems.

Potential applications include quantum-enhanced interferometry and atomic metrology.

Abstract

We introduce the concept of a squeezed laser, in which a squeezed cavity mode develops a macroscopic photonic occupation due to stimulated emission. Above the lasing threshold, the emitted light retains both the spectral purity inherent of a laser and the photon correlations characteristic of a photonic mode with squeezed quadratures. Our proposal, which can be implemented in optical setups, relies on the parametric driving of the cavity and dissipative stabilization by a broadband squeezed vacuum. The squeezed laser can find applications that go beyond those of standard lasers thanks to the squeezed character, such as the direct application in Michelson interferometry beyond the standard quantum limit, or its use in atomic metrology.