Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 34: Poster 1

Q 34.71: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II

Double-diffraction scheme for a Bragg matter-wave interferometerEnno Giese1, •Albert Roura1, Ernst M. Rasel2, and Wolfgang P. Schleich11Institut für Quantenphysik, Universität Ulm — 2Institut für Quantenoptik, LU Hannover

Two pairs of counterpropagating laser beams have recently been employed to implement a double-diffraction scheme for atom interferometers based on two-photon stimulated Raman transitions [1]. This enables symmetric configurations which mitigate the effect of noise sources acting differently on atoms with different internal states as well as doubling the momentum transfer. Combined with the use of retroreflected beams it also helps reduce systematic effects due to wave-front distortions. On the other hand, Bragg diffraction has been shown to be a suitable and convenient technique for interferometry with Bose-Einstein condensates (BECs) [2]. Here we analyze the extension of symmetric configurations based on double diffraction to this case. In particular we study in detail the adiabatic elimination of the detuned excited state and the richer dynamics associated with the effective Hamiltonian for the resulting three-dimensional Hilbert space. This could have important applications to matter-wave interferometry with cold atoms in space.

T. Lévèque et al., Phys. Rev. Lett. 103, 080405 (2009).
Y. Torii et al., Phys. Rev. A 61, 041602(R) (2000).

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