Molecular impurities interacting with a many-particle environment: from helium droplets to ultracold gases

Abstract

In several settings of physics and chemistry one has to deal with molecules interacting with some kind of an external environment, be it a gas, a solution, or a crystal surface. Understanding molecular processes in the presence of such a many-particle bath is inherently challenging, and usually requires large-scale numerical computations. Here, we present an alternative approach to the problem - that based on the notion of the angulon quasiparticle. We show that molecules rotating inside superfluid helium nanodroplets and Bose-Einstein Condensates form angulons, and therefore can be described by straightforward solutions of a simple microscopic Hamiltonian. Casting the problem in the language of angulons allows not only to tremendously simplify it, but also to gain insights into the origins of the observed phenomena and to make predictions for future experimental studies.

45 pages, 14 figures. Tutorial on angulon quasiparticles

Cited by in corpus (12)

• Quantum control of molecular rotation
• Robust encoding of a qubit in a molecule
• Quantum many-body dynamics of the Einstein-de Haas effect
• Emergence of non-abelian magnetic monopoles in a quantum impurity problem
• Fingerprints of angulon instabilities in the spectra of matrix-isolated molecules
• Theory of the Rotating Polaron: Spectrum and Self-Localization
• Diagrammatic Monte Carlo approach to angular momentum in quantum many-particle systems
• Diagrammatic approach to orbital quantum impurities interacting with a many-particle environment
• Variational approaches to quantum impurities: from the Fröhlich polaron to the angulon
• Rotational cooling of molecules in a Bose-Einstein-Condensate
• Effect of a magnetic field on molecule-solvent angular momentum transfer
• Environment-limited transfer of angular momentum in Bose liquids