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Faraday Rotation with Single Nuclear Spin Qubit in a High-Finesse Optical Cavity

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arxiv 0912.4948 v3 pith:K5VAPELR submitted 2009-12-25 quant-ph

classification quant-ph
keywords singlespinfaradaynuclearrotationspinsatomiccavity
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When an off-resonant light field is coupled with atomic spins, its polarization can rotate depending on the direction of the spins via a Faraday rotation which has been used for monitoring and controlling the atomic spins. We observed Faraday rotation by an angle of more than 10 degrees for a single 1/2 nuclear spin of 171Yb atom in a high-finesse optical cavity. By employing the coupling between the single nuclear spin and a photon, we have also demonstrated that the spin can be projected or weakly measured through the projection of the transmitted single ancillary photon.

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