Increasing the sensitivity of future gravitational-wave detectors with double squeezed-inputстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We consider improving the sensitivity of future interferometric gravitational-wave detectors by simultaneously sending two squeezed vacuums (light), filtered by a resonant Fabry-Perot cavity, into the dark port of the interferometer. The same scheme with single squeezed vacuum was first proposed and analyzed by Corbitt et al. [1]. Here we show that the extra squeezed vacuum, together with an additional homodyne detection suggested previously by one of the authors [2], allows reduction of quantum noise over the entire detection band. To motivate future implementations, we take into account of realistic technical noise budget for Advanced LIGO (AdvLIGO) and numerically optimize the parameters of both the filter and the interferometer for detecting gravitational-wave signals from two important astrophysics sources, namely Neutron-Star–Neutron-Star (NSNS) binaries and Bursts. Assuming the optical loss of the ∼ 30 m-long filter cavity ∼ 10−5 per bounce and 10 dB squeezing injection, the corresponding quantum noise with optimal parameters decrease by a factor of 10 at high frequencies and goes below the technical noise at low and intermediate frequencies.