Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.4: Poster

Monday, March 23, 2015, 17:00–19:00, C/Foyer

Decoherence of squeezed spatial superposition states of a BEC — •Björn Schrinski, Stefan Nimmrichter, and Klaus Hornberger — Physikalische Fakultät, Universität Duisburg-Essen

We study the influence of collisional decoherence and of macrorealistic collapse models on number-squeezed superpositions of Bose-Einstein condensates in a double-well configuration. These superpositions were recently produced in an experiment with ultracold Rubidium atoms [1]. Our analysis is based on a many-body generalization of the single-particle collisional decoherence master equation. It can be employed to assess the degree of macroscopicity [2] reached in such squeezed BEC interference experiments.

[1] Nat. Commun. 4, 2077 (2013)

[2] Phys. Rev. Lett. 110, 160403 (2013)