Conversion of conventional gravitational-wave interferometers into quantum nondemolition interferometers by modifying their input and/or output optics

@article{Kimble2001ConversionOC,
  title={Conversion of conventional gravitational-wave interferometers into quantum nondemolition interferometers by modifying their input and/or output optics},
  author={Harry J. Kimble and Yuri Levin and Andrey B. Matsko and Kip S. Thorne and Sergey P. Vyatchanin California Institute of Technology and University of Southern California and Berkeley and Texas AM University and Moscow state University},
  journal={Physical Review D},
  year={2001},
  volume={65},
  pages={022002}
}
The LIGO-II gravitational-wave interferometers (ca. 2006–2008) are designed to have sensitivities near the standard quantum limit (SQL) in the vicinity of 100 Hz. This paper describes and analyzes possible designs for subsequent LIGO-III interferometers that can beat the SQL. These designs are identical to a conventional broad band interferometer (without signal recycling), except for new input and/or output optics. Three designs are analyzed: (i) a squeezed-input interferometer (conceived by… 
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