Atom Fock state preparation by trap reduction

Details Atom Fock state preparation by trap reduction Atom Fock state preparation by trap reduction

2007-11-12

arxiv.org/abs/0711.1829v2

Phys. Rev. A 78, 023412 (2008)

Physics

Quantum Physics

4 pages

Scientific paper

10.1103/PhysRevA.78.023412

We study the production of low atom number Fock states by reducing suddenly the potential trap in a 1D strongly interacting (Tonks-Girardeau) gas. The fidelity of the Fock state preparation is characterized by the average and variance of the number of trapped atoms. Two different methods are considered: making the trap shallower (atom culling [A. M. Dudarev {\it et al.}, Phys. Rev. Lett. {\bf 98}, 063001 (2007)], also termed ``trap weakening'' here) and making the trap narrower (trap squeezing). When used independently, the efficiency of both procedures is limited as a result of the truncation of the final state in momentum or position space with respect to the ideal atom number state. However, their combination provides a robust and efficient strategy to create ideal Fock states.

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