Proposal for gravitational-wave detection beyond the standard quantum limit through EPR entanglement

@article{Ma2017ProposalFG,
  title={Proposal for gravitational-wave detection beyond the standard quantum limit through EPR entanglement},
  author={Y. Ma and H. Miao and B. Pang and M. Evans and C. Zhao and J. Harms and R. Schnabel and Yanbei Chen},
  journal={Nature Physics},
  year={2017},
  volume={13},
  pages={776-780}
}
In continuously monitored systems the standard quantum limit is given by the trade-off between shot noise and back-action noise. In gravitational-wave detectors, such as Advanced LIGO, both contributions can be simultaneously squeezed in a broad frequency band by injecting a spectrum of squeezed vacuum states with a frequency-dependent squeeze angle. This approach requires setting up an additional long baseline, low-loss filter cavity in a vacuum system at the detector’s site. Here, we show… Expand
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