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Q: Fachverband Quantenoptik und Photonik

Q 15: Matter-wave optics

Q 15.4: Vortrag

Montag, 18. März 2013, 17:30–17:45, F 142

Gravity gradient corrections in µ-gravity. — •Luis Fernando Barragan Gil, Oliver Gabel, and Reinhold Walser — Institut für Angewandte Physik, TU-Darmstadt, Hochschulstr. 4a, 64289 Darmstadt

The realization of Bose-Einstein condensates in µ-gravity conditions, at the ZARM drop tower in Bremen by the QUANTUS collaboration [1,2], has opened the possibility to measure corrections to local gravitational field of the Earth beyond the linear Earth’s acceleration (g) [3,4]. This is known as the gravity gradient correction and it is the next dominan contribution found in classical newtonian Physics as well as in general relativistic view of gravity.

We analyse a matter-wave interferometer for coherent states and thermal ensambles in the presence of the harmonic corrections to the gravitational potential. In this work, we use the formalism of generalized squeezed states and compare the results for various experimental observables as interference fringe spacing.

[1] Quantus Collaboration http://www.iqo.uni-hannover.de/quantus.html

[2] van Zoest, T. et al. Bose-Einstein Condensation in Microgravity, Science, 328, 1540-1543 (2010)

[3] Dimopoulos, S. et al. General Relativistic effects in atom interferometry, Phys. Rev. D, 78 042003 (2008)

[4] Kasevich, M. A. and Chu, S.Atom Interferometry Using Stimulated Raman Transitions,phys. Rev. D, 67, 181-184 (1991)