In-loop squeezing is real squeezing to an in-loop atom

Abstract

Electro-optical feedback can produce an in-loop photocurrent with arbitrarily low noise. This is not regarded as evidence of `real' squeezing because squeezed light cannot be extracted from the loop using a linear beam splitter. Here I show that illuminating an atom (which is a nonlinear optical element) with `in-loop' squeezed light causes line-narrowing of one quadrature of the atom's fluorescence. This has long been regarded as an effect which can only be produced by squeezing. Experiments on atoms using in-loop squeezing should be much easier than those with conventional sources of squeezed light.

4 pages, 2 figures, submitted to PRL

References in corpus (1)

• Mimicking a Squeezed Bath Interaction: Quantum Reservoir Engineering with Atoms

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