Quantum noise in optical interferometers

Details Quantum noise in optical interferometers Quantum noise in optical interferometers

2010-06-24

arxiv.org/abs/1006.4772v1

Phys. Rev. A 81, 053816 (2010)

Physics

Quantum Physics

15 pages, 7 figures

Scientific paper

10.1103/PhysRevA.81.053816

We study the photon counting noise in optical interferometers used for gravitational wave detection. In order to reduce quantum noise a squeezed vacuum is injected into the usually unused input port. It is investigated under which conditions the gravitational wave signal may be amplified without increasing counting noise concurrently. Such a possibility was suggested as a consequence of the entanglement of the two output ports of a beam splitter. We find that amplification without concurrent increase of noise is not possible for reasonable squeezing parameters. Photon distributions for various beam splitter angles and squeezing parameters are calculated.

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