Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster: Quantum Optics and Photonics II
Q 27.37: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
The role of initial conditions in measurements with open atom interferometers — •Wolfgang Zeller1, Albert Roura1, Wolfgang P. Schleich1, and the QUANTUS TEAM1,2,3,4,5,6,7,8 — 1Institut für Quantenphysik, Universität Ulm — 2Institut für Quantenoptik, LU Hannover — 3ZARM, Universität Bremen — 4Institut für Physik, HU Berlin — 5Institut für Physik, JGU Mainz — 6Institut für angewandte Physik, TU Darmstadt — 7MUARC, University of Birmingham, UK — 8Lab. Kastler Brossel, E. N. S., France
In the last 25 years light-pulse atom interferometers have opened a new route to high-precision measurements of fundamental constants, inertial sensing and gravimetry. In particular, differential measurements with two species can test the universality of free fall (UFF) with quantum objects and offer a valuable complement to classical tests. In the presence of gravity gradients or rotations the interference signal depends on the central position and momentum of the initial atomic wave packet. In UFF tests, this can mimic a violation and is known as the co-location problem. In our contribution, we exploit the formalism developed in [1,2] to cast light on such a dependence on the initial conditions from the point of view of open interferometers. This insight helps to find suitable strategies to significantly relax the co-location problem.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Energy (BMWi) under grant number 50WM1556.
[1] Roura, Zeller and Schleich, New J. Phys. 16, 123012 (2014).
[2] Zeller, Roura and Schleich, in preparation.