Thermal aberrations induce low-pass frequency dynamics for quadratic wavefront mismatches and high-pass dynamics for higher-order aberrations, degrading squeezed states differently in current versus future gravitational wave detectors.
Quantum limit for laser interferometric gravitational wave detectors from optical dissipation
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abstract
We derive a quantum limit to the sensitivity of laser interferometric gravitational-wave detectors from optical-loss-induced dissipation, analogous to the sensitivity limit from the mechanical dissipation. It applies universally to different interferometer configurations, and cannot be surpassed unless the optical property is improved. This result provides an answer to the long-standing question of how far we can push the detector sensitivity given the state-of-the-art optics.
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Extends prior two-photon formalism to compute true motion and optimal cooling in multi-DOF GW detector test masses, finding sub-unity occupation numbers possible over the oscillator bandwidth for common definitions.
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Squeezed state degradations due to mode mismatch and thermal aberrations in gravitational wave detectors
Thermal aberrations induce low-pass frequency dynamics for quadratic wavefront mismatches and high-pass dynamics for higher-order aberrations, degrading squeezed states differently in current versus future gravitational wave detectors.
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True and apparent motion of optomechanical resonators, with applications to feedback cooling of gravitational wave detector test masses
Extends prior two-photon formalism to compute true motion and optimal cooling in multi-DOF GW detector test masses, finding sub-unity occupation numbers possible over the oscillator bandwidth for common definitions.