Capture Dynamics of Ultracold Atoms in the Presence of an Impurity Ion

Abstract

We explore the quantum dynamics of a one-dimensional trapped ultracold ensemble of bosonic atoms triggered by the sudden creation of a single ion. The numerical simulations are performed by means of the ab initio multiconfiguration time-dependent Hartree method for bosons which takes into account all correlations. The dynamics is analyzed via a cluster expansion approach, adapted to bosonic systems of fixed particle number, which provides a comprehensive understanding of the occurring many-body processes. After a transient during which the atomic ensemble separates into fractions which are unbound and bound with respect to the ion, we observe an oscillation in the atomic density which we attribute to the additional length and energy scale induced by the attractive long-range atom-ion interaction. This oscillation is shown to be the main source of spatial coherence and population transfer between the bound and the unbound atomic fraction. Moreover, the dynamics exhibits collapse and revival behavior caused by the dynamical build-up of two-particle correlations demonstrating that a beyond mean-field description is indispensable.

14 pages, 8 figures

References in corpus (12)

• The density-matrix renormalization group in the age of matrix product states
• Observation of dipole-dipole interaction in a degenerate quantum gas
• A trapped single ion inside a Bose-Einstein condensate
• The multi-configurational time-dependent Hartree method for bosons: Many-body dynamics of bosonic systems
• Reduced density matrices and coherence of trapped interacting bosons
• Quantum theory of ultracold atom-ion collisions
• Controlled collisions of a single atom and ion guided by movable trapping potentials
• Best mean-field for condensates
• Cold interactions between an Yb${}^{+}$ ion and a Li atom: Prospects for sympathetic cooling, radiative association, and Feshbach resonances
• A far-off-resonance optical trap for a Ba${}^{+}$ ion
• Ground state properties of ultracold trapped bosons with an immersed ionic impurity
• Quantum dynamics of an atomic double-well system interacting with a trapped ion

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