Emergence of non-abelian magnetic monopoles in a quantum impurity problem Journal Article

Author(s): Yakaboylu, Enderalp; Deuchert, Andreas; Lemeshko, Mikhail
Article Title: Emergence of non-abelian magnetic monopoles in a quantum impurity problem
Affiliation IST Austria
Abstract: Recently it was shown that molecules rotating in superfluid helium can be described in terms of the angulon quasiparticles (Phys. Rev. Lett. 118, 095301 (2017)). 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.
Keywords: Quantum Gases (cond-mat.quant-gas); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Other Condensed Matter (cond-mat.other); Atomic Physics (physics.atom-ph); Quantum Physics (quant-ph)
Journal Title: APS Physics, Physical Review Letters
Volume: 119
Publisher: American Physiological Society  
Date Published: 2017-12-06
Start Page: Article number: 235301
End Page: 6
DOI: 10.1103/PhysRevLett.119.235301
Notes: We are grateful to G. Bighin, S. Castrignano, S. Meuren, B. Midya, D. Monaco, R. Schmidt, M. Serbyn, and H. Weimer for valuable discussions. E. Y. acknowledges financial support received from the People Programme (Marie Curie Actions)of the European Union’s Seventh Framework Programme (FP7 / 2007-2013) under REA grant agreement No. [291734]. A. D. acknowledges support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 694227). M. L. acknowledges support from the Austrian Science Fund (FWF), under project No. P29902-N27
Open access: yes (repository)
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