Rotation of quantum impurities in the presence of a many-body environment

R. Schmidt, M. Lemeshko, Physical Review Letters 114 (2015).


Journal Article | Published | English
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Abstract
We develop a microscopic theory describing a quantum impurity whose rotational degree of freedom is coupled to a many-particle bath. We approach the problem by introducing the concept of an “angulon”—a quantum rotor dressed by a quantum field—and reveal its quasiparticle properties using a combination of variational and diagrammatic techniques. Our theory predicts renormalization of the impurity rotational structure, such as that observed in experiments with molecules in superfluid helium droplets, in terms of a rotational Lamb shift induced by the many-particle environment. Furthermore, we discover a rich many-body-induced fine structure, emerging in rotational spectra due to a redistribution of angular momentum within the quantum many-body system.
Publishing Year
Date Published
2015-05-18
Journal Title
Physical Review Letters
Volume
114
Issue
20
Article Number
203001
IST-REx-ID

Cite this

Schmidt R, Lemeshko M. Rotation of quantum impurities in the presence of a many-body environment. Physical Review Letters. 2015;114(20). doi:10.1103/PhysRevLett.114.203001
Schmidt, R., & Lemeshko, M. (2015). Rotation of quantum impurities in the presence of a many-body environment. Physical Review Letters, 114(20). https://doi.org/10.1103/PhysRevLett.114.203001
Schmidt, Richard, and Mikhail Lemeshko. “Rotation of Quantum Impurities in the Presence of a Many-Body Environment.” Physical Review Letters 114, no. 20 (2015). https://doi.org/10.1103/PhysRevLett.114.203001.
R. Schmidt and M. Lemeshko, “Rotation of quantum impurities in the presence of a many-body environment,” Physical Review Letters, vol. 114, no. 20, 2015.
Schmidt R, Lemeshko M. 2015. Rotation of quantum impurities in the presence of a many-body environment. Physical Review Letters. 114(20).
Schmidt, Richard, and Mikhail Lemeshko. “Rotation of Quantum Impurities in the Presence of a Many-Body Environment.” Physical Review Letters, vol. 114, no. 20, 203001, American Physical Society, 2015, doi:10.1103/PhysRevLett.114.203001.

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