Ab initio few-mode theories for quantum potential scattering problems
- Date: May 20, 2019
- Time: 14:00 - 15:30
- Speaker: Dominik Lentrodt
- Max-Planck-Institut für Kernphysik, Heidelberg
- Location: CFEL (Bldg. 99)
- Room: Seminar Room IV, O1.111
- Host: Angel Rubio
Recently, however, various experimental platforms have emerged where multi-mode effects and the openness of the system constitute an essential part of the physics [1,2,3], and where the applicability of few-mode models has been debated. In this talk, we will present "ab initio few-mode theory" , where these factors are treated systematically and which allows to include new physics into Jaynes-Cummings type models without abandoning their conceptual and computational simplicity.
We will outline some implications, in particular for the new field of X-ray cavity QED. From a practical perspective, our method connects the extensive toolbox of few-mode models to ab initio theory. From a more general perspective, it constitutes a non-perturbative expansion scheme that allows to extract the relevant degrees of freedom of quantized scattering problems . As such, it may find applications in a broader context ranging from transport theory to open quantum dynamics.
 A. Frisk Kockum et al., Nat. Rev. Phys. 1, 19–40 (2019)
 G. Hackenbroich et al., Phys. Rev. Lett. 89, 083902 (2002)
 S. Rotter and S. Gigan, Rev. Mod. Phys. 89, 015005 (2017)
 D. Lentrodt and J. Evers, submitted, arXiv:1812.08556