Conditions for Factorizable Output From a Beam splitter

Details Conditions for Factorizable Output From a Beam splitter Conditions for Factorizable Output From a Beam splitter

2009-06-10

arxiv.org/abs/0906.1885v1

Physics

Quantum Physics

6 pages, published in PRA

Scientific paper

10.1103/PhysRevA.79.062303

A beam splitter is one of the most important devices in an optics laboratory because of its handiness and versatility; equivalent devices are found in various quantum systems to couple two subsystems or to interfere them. While it is normal that two independent input fields are superposed at the beam splitter to give correlated outputs, identical Gaussian states interfere there to produce totally independent output fields. We prove that Gaussian states with same the variance are the only states which bring about factorizable output fields.

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