Anomalous screening of quantum impurities by a neutral environment

E. Yakaboylu, M. Lemeshko, Physical Review Letters 118 (2017).


Journal Article | Published | English
Department
Abstract
It is a common knowledge that an effective interaction of a quantum impurity with an electromagnetic field can be screened by surrounding charge carriers, whether mobile or static. Here we demonstrate that very strong, "anomalous" screening can take place in the presence of a neutral, weakly polarizable environment, due to an exchange of orbital angular momentum between the impurity and the bath. Furthermore, we show that it is possible to generalize all phenomena related to isolated impurities in an external field to the case when a many-body environment is present, by casting the problem in terms of the angulon quasiparticle. As a result, the relevant observables such as the effective Rabi frequency, geometric phase, and impurity spatial alignment are straightforward to evaluate in terms of a single parameter: the angular-momentum-dependent screening factor.
Publishing Year
Date Published
2017-02-22
Journal Title
Physical Review Letters
Volume
118
Issue
8
Article Number
085302
ISSN
IST-REx-ID

Cite this

Yakaboylu E, Lemeshko M. Anomalous screening of quantum impurities by a neutral environment. Physical Review Letters. 2017;118(8). doi:10.1103/PhysRevLett.118.085302
Yakaboylu, E., & Lemeshko, M. (2017). Anomalous screening of quantum impurities by a neutral environment. Physical Review Letters, 118(8). https://doi.org/10.1103/PhysRevLett.118.085302
Yakaboylu, Enderalp, and Mikhail Lemeshko. “Anomalous Screening of Quantum Impurities by a Neutral Environment.” Physical Review Letters 118, no. 8 (2017). https://doi.org/10.1103/PhysRevLett.118.085302.
E. Yakaboylu and M. Lemeshko, “Anomalous screening of quantum impurities by a neutral environment,” Physical Review Letters, vol. 118, no. 8, 2017.
Yakaboylu E, Lemeshko M. 2017. Anomalous screening of quantum impurities by a neutral environment. Physical Review Letters. 118(8).
Yakaboylu, Enderalp, and Mikhail Lemeshko. “Anomalous Screening of Quantum Impurities by a Neutral Environment.” Physical Review Letters, vol. 118, no. 8, 085302, American Physical Society, 2017, doi:10.1103/PhysRevLett.118.085302.

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