Sagnac interferometry based on ultra-slow polaritons in cold atomic vapors

Details Sagnac interferometry based on ultra-slow polaritons in cold atomic vapors Sagnac interferometry based on ultra-slow polaritons in cold atomic vapors

2003-12-23

arxiv.org/abs/quant-ph/0312187v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.92.253201

The advantages of light and matter-wave Sagnac interferometers -- large area on one hand and high rotational sensitivity per unit area on the other -- can be combined utilizing ultra-slow light in cold atomic gases. While a group-velocity reduction alone does not affect the Sagnac phase shift, the associated momentum transfer from light to atoms generates a coherent matter-wave component which gives rise to a substantially enhanced rotational signal. It is shown that matter-wave sensitivity in a large-area interferometer can be achieved if an optically dense vapor at sub-recoil temperatures is used. Already a noticeable enhancement of the Sagnac phase shift is possible however with much less cooling requirements.

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