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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.15: Poster

Mittwoch, 14. März 2018, 15:00–19:00, Poster B

Emergence of non-abelian magnetic monopoles in a quantum impurity problem — •Enderalp Yakaboylu, Andreas Deuchert, and Mikhail Lemeshko — IST Austria (Institute of Science and Technology Austria), Am Campus 1, 3400 Klosterneuburg, Austria

Recently it was shown that molecules rotating in superfluid helium can be described in terms of the angulon quasiparticles [1]. Here we demonstrate that in the experimentally realized regime the angulon can be seen as a point charge on a 2-sphere interacting with a gauge field of a non-abelian magnetic monopole. Unlike in several other settings, the gauge fields of the angulon problem emerge in the real coordinate space, as opposed to the momentum space or some effective parameter space. Furthermore, we find a topological transition associated with making the monopole abelian, which takes place in the vicinity of the previously reported angulon instabilities. These results pave the way for studying topological phenomena in experiments on molecules trapped in superfluid helium nanodroplets, as well as on other realizations of orbital impurity problems [2].
M. Lemeshko, Phys. Rev. Lett. 118, 95301 (2017).
E. Yakaboylu, A. Deuchert, and M. Lemeshko, arXiv:1705.05162.