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

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

2009-12-25

arxiv.org/abs/0912.4948v3

Phys. Rev. A 81, 042331 (2010).

Physics

Quantum Physics

6 pages, 6 figures

Scientific paper

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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