Variational approaches to quantum impurities: from the Fröhlich polaron to the angulon
arXiv:1810.10302 · doi:10.1080/00268976.2019.1567852
Abstract
Problems involving quantum impurities, in which one or a few particles are interacting with a macroscopic environment, represent a pervasive paradigm, spanning across atomic, molecular, and condensed-matter physics. In this paper we introduce new variational approaches to quantum impurities and apply them to the Fröhlich polaron -- a quasiparticle formed out of an electron (or other point-like impurity) in a polar medium, and to the angulon -- a quasiparticle formed out of a rotating molecule in a bosonic bath. We benchmark these approaches against established theories, evaluating their accuracy as a function of the impurity-bath coupling.
arXiv comment12 pages, 3 figures, to appear in a special issue of Molecular Physics dedicated to Nimrod Moiseyev's 70th birthday
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Cited by in corpus (9)
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- Correlated quantum dynamics of two quenched fermionic impurities immersed in a Bose-Einstein Condensate
- Dynamics of relaxation and dressing of a quenched Bose polaron
- Polarons and their induced interactions in highly imbalanced triple mixtures
- Bose polaron in spherical trap potentials: Spatial structure and quantum depletion
- Polaron catastrophe within quantum acoustics
- Diagrammatic Monte Carlo for electronic correlation in molecules: high-order many-body perturbation theory with low scaling
- Environment-limited transfer of angular momentum in Bose liquids