A Continuous Non-demolition Measurement of the Cs Clock Transition Pseudo-spin

Details A Continuous Non-demolition Measurement of the Cs Clock Transition Pseudo-spin A Continuous Non-demolition Measurement of the Cs Clock Transition Pseudo-spin

2005-06-19

arxiv.org/abs/quant-ph/0506158v2

Phys. Rev. Lett. 96, 043001 (2006)

Physics

Quantum Physics

4 pages, 4 figures, ReVTeX, modified text in response to referee's comments

Scientific paper

10.1103/PhysRevLett.96.043001

We demonstrate a weak continuous measurement of the pseudo-spin associated with the clock transition in a sample of Cs atoms. Our scheme uses an optical probe tuned near the D1 transition to measure the sample birefringence, which depends on the z-component of the collective pseudospin. At certain probe frequencies the differential light shift of the clock states vanishes and the measurement is non-perturbing. In dense samples the measurement can be used to squeeze the collective clock pseudo-spin, and has potential to improve the performance of atomic clocks and interferometers.

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