The use of squeezed states and balanced homodyne for detecting gravitational waves

TL;DR

This paper explores how squeezed states and balanced homodyne detection can reduce quantum noise in gravitational wave detectors, potentially improving their sensitivity by using quantum optics techniques.

Contribution

It introduces a method for employing squeezed vacuum states and balanced homodyne detection to enhance gravitational wave detection sensitivity.

Findings

Quantum noise can be reduced using squeezed vacuum states.

Balanced homodyne detection improves photon measurement accuracy.

Enhanced detection sensitivity for gravitational waves.

Abstract

The possibility of using squeezed states and balanced homodyne detection of gravitational waves is discussed. It is shown that the quantum noise due to high laser intensities in Michelson interferometer for gravitational waves detection can be reduced by sending squeezed vacuum states to the 'dark' port of the interferometer. The present analysis describes photon statistics measurements effects related to quadrature balanced homodyne detection showing the advantage of using this scheme for detecting gravitational waves.