AC Stark shift noise in QND measurement arising from quantum fluctuations of light polarization

Details AC Stark shift noise in QND measurement arising from quantum fluctuations of light polarization AC Stark shift noise in QND measurement arising from quantum fluctuations of light polarization

2004-07-24

arxiv.org/abs/physics/0407125v1

Physics

Atomic Physics

This is a companion note to physics/0403097

Scientific paper

In a recent letter [Auzinsh {\it{et. al.}} (physics/0403097)] we have analyzed the noise properties of an idealized atomic magnetometer that utilizes spin squeezing induced by a continuous quantum nondemolition measurement. Such a magnetometer measures spin precession of $N$ atomic spins by detecting optical rotation of far-detuned probe light. Here we consider maximally squeezed probe light, and carry out a detailed derivation of the contribution to the noise in a magnetometric measurement due to the differential AC Stark shift between Zeeman sublevels arising from quantum fluctuations of the probe polarization.

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