Mitigating quantum decoherence in force sensors by internal squeezing

Abstract

The most efficient approach to laser interferometric force sensing to date uses monochromatic carrier light with its signal sideband spectrum in a squeezed vacuum state. Quantum decoherence, i.e. mixing with an ordinary vacuum state due to optical losses, is the main sensitivity limit. In this work, we present both theoretical and experimental evidence that quantum decoherence in high-precision laser interferometric force sensors enhanced with optical cavities and squeezed light injection can be mitigated by a quantum squeeze operation inside the sensor's cavity. Our experiment shows an enhanced measurement sensitivity that is independent of the optical readout loss in a wide range. Our results pave the way for quantum improvements in scenarios where high decoherence previously precluded the use of squeezed light. Our results hold significant potential for advancing the field of quantum sensors and enabling new experimental approaches in high-precision measurement technology.

References in corpus (6)

• Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency
• Quantum Optical Metrology -- The Lowdown on High-N00N States
• Optimal Quantum Phase Estimation
• Coherent control of vacuum squeezing in the Gravitational-Wave Detection Band
• Detection loss tolerant supersensitive phase measurement with an SU(1,1) interferometer
• Engineering the Optical Spring via Intra-Cavity Optical-Parametric Amplification

Cited by in corpus (4)

• Kerr-Enhanced Optical Spring
• Fundamental sensitivity limit of lossy cavity-enhanced interferometers with external and internal squeezing
• Amplified Squeezed States: Analyzing Loss and Phase Noise
• Sensing and control scheme for the inteferometer configuration with an L-shaped resonator