Quantum

Quantum Noise Engineering in Advanced LIGO

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 06/11/2026, 05:13:25 UTC.

Briefings

This review explains how quantum noise affects Advanced LIGO, a gravitational-wave detector operating near optical measurement limits. It describes how squeezed vacuum is generated and manipulated to engineer quantum noise, and how correlations between optical quadratures relate to measurement imprecision and radiation-pressure back-action. The article concludes that LIGO serves as both a gravitational-wave observatory and a platform for quantum measurement science.

Key points

• Advanced LIGO operates at extreme sensitivity, approaching the quantum limits of optical measurement.
• Squeezed vacuum is generated, propagated through the interferometer, and interacts with the filter cavity.

Context

Advanced LIGO is a gravitational-wave detector with extreme sensitivity, operating close to the quantum limits of optical measurement. The review explains how squeezed vacuum is generated and manipulated to engineer quantum noise, and how correlations between optical quadratures relate to measurement imprecision and radiation-pressure back-action.

Limitations

The evidence is a preprint (arXiv:2611.07074v1) with no peer review or publication date. The snapshot covers only the generation, propagation, and interaction of squeezed vacuum within the interferometer, excluding other noise sources or detector components.

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