Berlin 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 2: Matter wave optics I
Q 2.7: Talk
Monday, March 17, 2014, 12:00–12:15, DO26 208
An atom-chip based atomic gravimeter — •Holger Ahlers1, Ernst Maria Rasel1, and The QUANTUS-TEAM2,3,4,5,6 — 1Institut für Quantenoptik, LU Hannover — 2ZARM, Universität Bremen — 3Institut für Physik, HU Berlin — 4Institut für Laser-Physik, Universität Hamburg — 5Institut für Quantenphysik, Universität Ulm — 6Institut für angewandte Physik, TU Darmstadt
Some of the main limitations of today’s atomic gravimeters are set by systematics involving the expansion of the atomic sample during the atom interferometer sequence.
Atom chips provide a promising atomic source for matter-wave interferometry in compact setups. Combining the production of quantum degenerate gases and magnetic field based atom optics for sample shaping, atom chips can provide atomic samples with effective temperatures in the lower nK regime. In this talk we present the realization of a Bragg diffraction based Mach-Zehnder like atom interferometer in our QUANTUS-I apparatus [1] using the chip surface as a retro-reflector for the beam-splitting light fields. In a preliminary result we measure the gravitational acceleration with a resolution of 2· 10−4 g using spatially resolved interferometer read out.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number DLR 50WM1131-1137.
[1] Mütinga, Ahlers, Krutzik, Wenzlawski et al., PRL 110, 093602