You are cordially invited to the SCL seminar of the Center for the Study of Complex Systems, which will be held on Thursday, 28 November 2019 at 14:00 in the library reading room “Dr. Dragan Popović" of the Institute of Physics Belgrade. The talk entitled

Self-focusing of interacting matter waves

will be given by Patrick Boegel (Institute for Quantum Physics, University of Ulm, Germany). Abstract of the talk:

A common way to control the position and the strength of maximal focusing of a matter-wave is to use a lens which imprints a position-dependent phase on the initial wave. However, quantum mechanics allows focusing even without a lens [1,2], based on diffractive focusing, where the initial wave function is real-valued with a non-Gaussian shape. Hence, the optimal focusing relies on a smart choice of this initial wave function [3]. In this talk, we will discuss the phenomenon of diffractive focusing of an atomic Bose-Einstein condensate in the regime where the resonant atom-atom interaction plays a key role, and describe this effect in phase space within the Wigner function approach.
 
[1] W. B. Case, et al., Optics Express 20, 27253 (2012).
[2] D. Weisman et al., Phys. Rev. Lett. 118, 154301 (2017).
[3] K. Vogel, et al., Chem. Phys. 375, 133 (2010).

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