Rotation of cold molecular ions inside a Bose-Einstein condensate

Abstract

We use recently developed angulon theory [Phys. Rev. Lett. 114, 203001 (2015)] to study the rotational spectrum of a cyanide molecular anion immersed into Bose-Einstein condensates of rubidium and strontium. Based on $\text{ab initio}$ potential energy surfaces, we provide a detailed study of the rotational Lamb shift and many-body-induced fine structure which arise due to dressing of molecular rotation by a field of phonon excitations. We demonstrate that the magnitude of these effects is large enough in order to be observed in modern experiments on cold molecular ions. Furthermore, we introduce a novel method to construct pseudopotentials starting from the $\text{ab initio}$ potential energy surfaces, which provides a means to obtain effective coupling constants for low-energy polaron models.

Final version

References in corpus (14)

• Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
• Observation of Attractive and Repulsive Polarons in a Bose-Einstein Condensate
• Attractive and repulsive Fermi polarons in two dimensions
• Bose polarons in the strongly interacting regime
• Fermi-Polaron: Diagrammatic Monte Carlo for Divergent Sign-Alternating Series
• Quantum transport through a Tonks-Girardeau gas
• Quantum dynamics of ultracold Bose polarons
• Excitation spectra and rf-response near the polaron-to-molecule transition from the functional renormalization group
• Rotation of quantum impurities in the presence of a many-body environment
• Reactive collisions of trapped anions with ultracold atoms
• Nuclear-spin dependent parity violation in diatomic molecular ions
• Shaping interactions between polar molecules with far-off-resonant light
• Exotic roton excitations in quadrupolar Bose-Einstein condensates
• Collisional state-changing of OH${}^{-}$ rotations by interaction with Rb atoms in cold traps

Cited by in corpus (26)

• Quantum control of molecular rotation
• Cold hybrid ion-atom systems
• Quasiparticle approach to molecules interacting with quantum solvents
• Laser-induced rotation of iodine molecules in He-nanodroplets: revivals and breaking-free
• Emergence of non-abelian magnetic monopoles in a quantum impurity problem
• Many-body interferometry of magnetic polaron dynamics
• Strongly aligned molecules inside helium droplets in the near-adiabatic regime
• Dynamical variational approach to Bose polarons at finite temperatures
• Interactions and chemical reactions in ionic alkali-metal and alkaline-earth-metal diatomic $A{B}^{+}$ and triatomic $A_2{B}^{+}$ systems
• Cold chemistry: a few-body perspective on impurity physics of a single ion in an ultracold bath
• 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
• Anomalous screening of quantum impurities by a neutral environment
• Diagrammatic approach to orbital quantum impurities interacting with a many-particle environment
• Ultracold ion-atom experiments: cooling, chemistry, and quantum effects
• Angular self-localization of impurities rotating in a bosonic bath
• Intermolecular forces and correlations mediated by a phonon bath
• Variational theory of angulons and their rotational spectroscopy
• Cold atom-ion systems in radiofrequency multipole traps: event-drive molecular dynamics and stochastic simulations
• Effect of a magnetic field on molecule-solvent angular momentum transfer
• Quantum rotor in a two-dimensional mesoscopic Bose gas
• Direct integral description of angulon
• A model for reducing the angulon operator
• Cold interactions and chemical reactions of linear polyatomic anions with alkali-metal and alkaline-earth-metal atoms
• Electric field dissociation of weakly bound molecular ions