QND measurements and state preparation in quantum gases by light detection

Details QND measurements and state preparation in quantum gases by light detection QND measurements and state preparation in quantum gases by light detection

2008-05-09

arxiv.org/abs/0805.1402v2

Phys. Rev. Lett. 102, 020403 (2009)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.102.020403

We consider light scattering from ultracold atoms trapped in an optical lattice into a cavity. The measurement of photons leaking out the cavity provides a quantum nondemolition (QND) access to various atomic variables. Depending on the chosen geometry the time resolved light detection projects the atomic quantum state to various atom-number squeezed and Schroedinger cat states. Modifications of the atomic and light properties at a single quantum trajectory are demonstrated. The quantum structure of final states can be revealed by further observations of the same sample.

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