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Q: Fachverband Quantenoptik und Photonik

Q 33: Quantengase: Bosonen

Q 33.5: Talk

Wednesday, March 4, 2009, 15:30–15:45, VMP 6 HS-A

Creation and detection of a mesoscopic gas in a non-local quantum superposition — •Christoph Weiss¹ and Yvan Castin² — ¹Institut für Physik, Universität Oldenburg — ²Laboratoire Kastler Brossel, École Normale Supérieure, Paris

We investigate the scattering of a quantum matter wave soliton on a barrier in a one dimensional geometry and we show that it can lead to mesoscopic Schrödinger cat states, where the atomic gas is in a coherent superposition of being in the half-space to the left of the barrier and being in the half-space to the right of the barrier. We propose an interferometric method to reveal the coherent nature of this superposition and we discuss in details the experimental feasibility.

[1] Phys. Rev. Lett, in press; arXiv:0806.3395v1