Quantum Nondemolition Measurement of a Quantum Squeezed State Beyond the 3 dB Limit.

@article{Lei2016QuantumNM,
  title={Quantum Nondemolition Measurement of a Quantum Squeezed State Beyond the 3 dB Limit.},
  author={Chan U. Lei and A. J. R. Weinstein and Jung Ki Suh and Emma Edwina Wollman and Andreas Kronwald and Florian Marquardt and Aashish A. Clerk and Keith C. Schwab},
  journal={Physical review letters},
  year={2016},
  volume={117 10},
  pages={100801}
}
We use a reservoir engineering technique based on two-tone driving to generate and stabilize a quantum squeezed state of a micron-scale mechanical oscillator in a microwave optomechanical system. Using an independent backaction-evading measurement to directly quantify the squeezing, we observe 4.7±0.9  dB of squeezing below the zero-point level surpassing the 3 dB limit of standard parametric squeezing techniques. Our measurements also reveal evidence for an additional mechanical parametric… CONTINUE READING
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