Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 50: Matter Wave Optics

Q 50.2: Talk

Thursday, March 9, 2017, 14:45–15:00, P 11

Interparticle interactions in atom interferometry — •Christian Ufrecht, Albert Roura, Wolfgang P. Schleich, and the QUANTUS team — Institut für Quantenphysik, Universität Ulm

In recent years, high-precision atom interferometry has attracted a lot of attention. In particular, light pulse interferometers with macroscopic arm separations and Bose-Einstein condensates as highly coherent atom sources provide enormous potential to measure e.g. field gradients with unprecedented accuracy. Interactions between the atoms, however, seem to limit the precision in phase measurements and introduce mean-field shifts. To better understand these effects, we translate the formalism of Ref. [1] into second quantization, where the inclusion of interactions is straightforward. The choice of a particular interaction picture helps us to split the problem in two parts: (i) A free evolution which is equivalent to Ref. [1], and (ii) an interaction which acts upon this result. Our approach identifies the effects purely originating from the interaction.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) under grant number 50WM1556.
[1] Kleinert, S., Kajari, E., Roura, A. and Schleich, W. P., Phys. Rept. 605, 1-50 (2015)