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Mesoscopic Non-classical Atomic States for Quantum Information and Metrology

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Using shot noise limited Quantum-Non-Demolition measurements, we prepare an entangled, spin squeezed ensemble of 105 cold Cs atoms [1], which we use to improve the precision of an atomic clock by >1 dB beyond the projection noise limit [2]. We report on progress towards applying our method for realizing and characterizing non-Gaussian atomic states.

© 2010 Optical Society of America

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