Observation of squeezed light with 10dB quantum noise reduction

TL;DR

This paper reports the experimental achievement of 10dB quantum noise reduction in squeezed light, demonstrating the feasibility of strong squeezing for advanced quantum applications like gravitational wave detection and quantum communication.

Contribution

The study provides the first experimental demonstration of achieving 10dB squeezing, surpassing previous doubts about the limits of squeezing strength.

Findings

Achieved 10dB squeezing in power (quantum noise reduction)

Analysis indicates potential for even higher squeezing levels

Validates the feasibility of strong squeezing for quantum technologies

Abstract

Squeezing of light's quantum noise requires temporal rearranging of photons. This again corresponds to creation of quantum correlations between individual photons. Squeezed light is a non-classical manifestation of light with great potential in high-precision quantum measurements, for example in the detection of gravitational waves. Equally promising applications have been proposed in quantum communication. However, after 20 years of intensive research doubts arose whether strong squeezing can ever be realized as required for eminent applications. Here we show experimentally that strong squeezing of light's quantum noise is possible. We reached a benchmark squeezing factor of 10 in power (10dB). Thorough analysis reveals that even higher squeezing factors will be feasible in our setup.