Quantum speed meter based on dissipative coupling

[摘要] We consider dissipative coupling Fabry-Perot cavity, i.e. its input mirror transmittance depends on position of probe mass. We show that dissipative coupling provide possibility to realize quantum speed meter by natural way, without additional setup for subtraction of position x(t) and delayed position x(t-τ). Quantum speed meter is a quantum non demolition (QND) meter which allow to overcome Standatd Quantum Limit - we show it for speed meter based on dissipative coupling.

[发布机构] Faculty of Physics, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow; 119991, Russia^1;OEwaves Inc., 465 North Halstead Street, Pasadena; CA; 91107, United States^2

[关键词] Dissipative coupling;Fabry-Perot cavity;Quantum limit;Quantum non demolition