Unification of thermal and quantum noise in gravitational-wave detectors

• URL: http://arxiv.org/abs/2301.00338v1
• Date: Sun, 1 Jan 2023 03:57:10 GMT
• Title: Unification of thermal and quantum noise in gravitational-wave detectors
• Authors: Chris Whittle, Lee McCuller, Vivishek Sudhir, Matthew Evans
• Abstract summary: We use the quantum fluctuation-dissipation theorem to unify all four noises. This picture shows precisely when test-mass quantization noise and optical thermal noise can be ignored.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Contemporary gravitational-wave detectors are fundamentally limited by thermal noise -- due to dissipation in the mechanical elements of the test mass -- and quantum noise -- from the vacuum fluctuations of the optical field used to probe the test mass position. Two other fundamental noises can in principle also limit sensitivity: test-mass quantization noise due to the zero-point fluctuation of its mechanical modes, and thermal excitation of the optical field. We use the quantum fluctuation-dissipation theorem to unify all four noises. This unified picture shows precisely when test-mass quantization noise and optical thermal noise can be ignored.

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