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Non demolition measurement for atom interferometry improvement

Simon Bernon, Thomas Vanderbruggen, Andréa D Bertoldi, Arnaud Landragin, Philippe Bouyer

Published Apr 1, 2010• 1 citation
OpenAlex

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We show that the accuracy of atomic interferometry can be improved by using QND measurements of the atomic populations at the inputs to the interferometer. The accuracy of such a scheme surpasses the standard quantum limit of phase measurement δϕ SQL = 1/√ N and could reach the Heisenberg limit δϕ ∼ 1/ N . We propose to perform QND measurements of atomic populations with an off-resonant laser field. The conditions necessary for this kind of QND measurement could be fulfilled in a variety of ways with current experimental techniques, including magneto-optical traps and atomic cells.