A Recent Study on Frequency-dependent Squeezing Generation with EPR Entanglement

A Recent Study on Frequency-dependent Squeezing Generation with EPR Entanglement

The sensitivity of gravitational wave interferometric detectors is ultimately limited by the quantum noise, which arises from the quantum nature of light and it is driven by vacuum fluctuations of the optical field entering from the dark port of the interferometer. One way to improve the sensitivity of gravitational wave interferometers is to inject squeezed vacuum into the dark port. This has been The key gravitational wave detectors (GEO, Advanced LIGO and Advanced VIRGO) have already been seen. We are researching tricks to generate a ‘frequency-dependent squeezing’: a typical approach is one or more optical cavities (300 m long cavities) to filter the squeezed optical field. An alternative method uses a pair of squeezed EPR (Einstein-Podolsky-Rosen) entangled beams to produce frequency beams (Optical Parametric Oscillator) This text will be discussed. Without the need for an external filter cavity, this approach promises to achieve a frequency-dependent optimisation of the injected squeezed light fields. Improving the sensitivity of the GW interferometric detectors would increase the quality and quantity of GW observations, enabling a deeper study of the sky and unexpected findings.

Author (s) Details

B. Garaventa
Department of Physics, University of Genova, Italy and INFN section of Genova, Italy.

M. Bawaj
Department of Physics and Geology, University of Perugia and INFN Perugia, Italy.

M. De Laurentis
Department of Physics, University of Napoli “Federico II”, Italy and INFN Napoli, Italy.

S. Di Pace
Department of Physics, University of Roma “La Sapienza”, Italy and INFN Roma1, Italy.

B. D’Angelo
Department of Physics, University of Genova, Italy and INFN Genova, Italy

I. Khan
Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France.

L. Naticchioni
Department of Physics, University of Genova, Italy and INFN Genova, Italy.

C. Nguyen
Department of Physics, University of Paris-Diderot, APC Laboratory, France.

V. Sequino
Department of Physics, University of Napoli “Federico II”, Italy and INFN Napoli, Italy.

F. Sorrentino
Department of Physics, University of Genova, Italy and INFN Genova, Italy.

J. P. Zendri
INFN Padova, Italy.

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