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Squeezed atomic clock below the standard quantum limit

October 25, 2010 - 12:30pm
Vladan Vuletic

The performance of the best atomic clocks and other precision atom interferometers is limited by the quantum noise in the final readout measurement, a situation referred to as the standard quantum limit. This limit arises from the projection postulate when applied to an ensemble of independent particles. I will discuss how quantum mechanically correlated (entangled) states of the many-body system can be used to overcome the standard quantum limit, and how to generate such states in an ensemble of distant atoms using light. We demonstrate a clock operated with a phase-squeezed input state that achieves a given precision almost three times faster than a clock operating at the standard quantum limit.

1201 Physics Building
College Park, MD 20742