2001/02/28 by Alessandra Buonanno, Yanbei Chen · 6 citations
Engineering · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Geophysics and Sensor Technology #Pulsars and Gravitational Waves Research #gr-qc #quant-ph
paper · pdf · doi:10.1103/physrevd.64.042006
published as Phys.Rev. D64 (2001) 042006 · 35 pages, 9 figures; few misprints corrected and some references added
arxiv created 2001/07/06 · openalex publication_date 2001/07/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
It has long been thought that the sensitivity of laser interferometric gravitational-wave detectors is limited by the free-mass standard quantum limit, unless radical redesigns of the interferometers or modifications of their input or output optics are introduced. Within a fully quantum-mechanical approach we show that in a second-generation interferometer composed of arm cavities and a signal recycling cavity, e.g., the LIGO-II configuration, (i) quantum shot noise and quantum radiation-pressure-fluctuation noise are dynamically correlated, (ii) the noise curve exhibits two resonant dips, (iii) the standard quantum limit can be beaten by a factor of 2, over a frequency range \ensuremathΔf/f\ensuremath∼1, but at the price of increasing noise at lower frequencies.