Measurement schemes for the spin quadratures on an ensemble of atoms

Details Measurement schemes for the spin quadratures on an ensemble of atoms Measurement schemes for the spin quadratures on an ensemble of atoms

2009-05-08

arxiv.org/abs/0905.1197v1

Applied Physics B: Lasers and Optics, 2011

Physics

Quantum Physics

4pages 2 figures

Scientific paper

10.1007/s00340-011-4717-7

We consider how to measure collective spin states of an atomic ensemble based on the recent multi-pass approaches for quantum interface between light and atoms. We find that a scheme with two passages of a light pulse through the atomic ensemble is efficient to implement the homodyne tomography of the spin state. Thereby, we propose to utilize optical pulses as a phase-shifter that rotates the quadrature of the spins. This method substantially simplifies the geometry of experimental schemes.

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