Broadband squeezed light from phase-locked single-mode sub-Poissonian lasers

TL;DR

This paper investigates a phase-locked single-mode sub-Poissonian laser that exhibits strong quadrature squeezing, making it suitable for quantum information tasks like teleportation and dense coding, with analysis based on Heisenberg-Langevin theory.

Contribution

It introduces a detailed analysis of a phase-locked sub-Poissonian laser's squeezing properties and discusses its potential for multichannel quantum information protocols.

Findings

Demonstrates strong quadrature squeezing in the laser output

Shows applicability to quantum teleportation and dense coding

Analyzes the multi-mode nature of the emitted field

Abstract

We consider sub-Poissonian single-mode laser with external synchronization and analyze its applicability to the problems of quantum information. Using Heisenberg-Langevin theory we calculate the quadrature variances of the field emitted by this laser. It is shown that such systems can demonstrate strong quadrature squeezing. Taking into account that the emitted field is temporally multi-mode the application of such sources to multichannel quantum teleportation and dense coding protocols is discussed.