Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 5: Precision Measurements and Metrology I
Q 5.5: Talk
Monday, March 11, 2019, 11:30–11:45, S SR 111 Maschb.
Perturbation theory for atom light-pulse interferometers — •Christian Ufrecht, Fabio Di Pumpo, Alexander Friedrich, Stephan Kleinert, Albert Roura, Enno Giese, Wolfgang P. Schleich, and the Quantus team — Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQST), Universität Ulm
In recent years a number of methods to calculate phase and contrast of atom light-pulse interferometers have been proposed, see for instance [1], [2]. Even though they are well suited within their range of validity, the application to anharmonic potentials often requires numerical simulations.
In this talk we will introduce a formalism to analytically calculate the effect of arbitrary - however small - anharmonic potentials, and show how to obtain a straightforward perturbative expansion of phase and contrast in powers of these contributions.
As an example we will analytically calculate the influence of the gravitational potential beyond the quadratic approximation.
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 (QUANTUS IV).
[1] Dimopoulos et. al., Phys. Rev. D 78, 042003, 2008
[2] Kleinert et. al., Phys. Rep. 605,1, 2015