2003/04/16 by F. Y. Khalili, F. Ya. Khalili · 17 citations
Engineering · Physics and Astronomy · #Acoustics #Antenna (radio) #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Electronic engineering #Energy (signal processing) #Engineering #Geophysics and Sensor Technology #Gravitational wave #Lever #Noise (video) #Optics #Physics #Pulsars and Gravitational Waves Research #Quantum #Quantum limit #Quantum mechanics #Sensitivity (control systems) #Telecommunications #gr-qc
paper · pdf · doi:10.1016/s0375-9601(03)01136-8
published in Physics Letters A 317(3-4), 169-180 (Elsevier BV) · 18 pages, 5 figures
arxiv created 2003/04/16 · openalex publication_date 2003/09/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The ``optical bars''/``optical lever'' topologies of gravitational-wave antennae allow to obtain sensitivity better that the Standard Quantum Limit while keeping the optical pumping energy in the antenna relatively low. Element of the crucial importance in these schemes is the local meter which monitors the local test mirror position. Using cross-correlation of this meter back-action noise and its measurement noise it is possible to further decrease the optical pumping energy. In this case the pumping energy minimal value will be limited by the internal losses in the antenna only. Estimates show that for values of parameters available for contemporary and planned gravitational-wave antennae, sensitivity about one order of magnitude better than the Standard Quantum Limit can be obtained using the pumping energy about one order of magnitude smaller energy than is required in the traditional topology in order to obtain the the Standard Quantum Limit level of sensitivity.