Application of quantum inequalities to quantum optics

Details Application of quantum inequalities to quantum optics Application of quantum inequalities to quantum optics

2002-03-06

arxiv.org/abs/quant-ph/0203027v3

Phys. Rev. A 66, 053801 (2002)

Physics

Quantum Physics

14 pages, 2 figures (improved format)

Scientific paper

10.1103/PhysRevA.66.053801

We establish a connection between quantum inequalities (known from quantum field theory on curved spacetimes) and the degree of squeezing in quantum-optical experiments. We prove an inequality which binds the reduction of the electric-field fluctuations to their duration. The bigger the level of fluctuations-suppression the shorter its duration. As an example of the application of this inequality in the case of squeezed light whose phase is controlled with 1% accuracy we derive a limit of -15dB on the allowed degree of squeezing.

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