Dynamical ion transfer between coupled Coulomb crystals in a double-well potential

Area of Science:

• Atomic, Molecular and Optical Physics
• Condensed Matter Physics
• Statistical Physics

Background:

• Coulomb crystals are ordered structures of charged particles interacting via long-range Coulomb forces.
• Trapping ions in potentials allows for the study of their collective behavior and dynamics.
• Nonequilibrium dynamics arise from sudden changes in system parameters, leading to complex emergent phenomena.

Purpose of the Study:

• To investigate the nonequilibrium dynamics of coupled Coulomb crystals in a double-well potential.
• To analyze ion transfer processes between wells induced by a potential barrier quench.
• To understand how crystal size, configuration, and quench amplitude affect ion dynamics.

Main Methods:

• Simulating coupled Coulomb crystals of varying sizes and configurations (1D, 2D, 3D) in a double-well potential.
• Inducing nonequilibrium dynamics via an instantaneous quench of the potential barrier.
• Analyzing ion reordering and transfer between wells based on Coulomb interactions and population asymmetry.

Main Results:

• Observed complex ion reordering within crystals and significant ion transfer between wells.
• Demonstrated that ion transfer strongly depends on the quench amplitude and crystalline configuration.
• Identified general principles governing ion transfer dynamics in coupled Coulomb crystal systems.

Conclusions:

• The study reveals fundamental insights into the nonequilibrium dynamics of Coulomb crystals.
• Ion transfer is a key phenomenon influenced by inter- and intracrystal interactions and system geometry.
• Understanding these dynamics provides insights into structural disorder and collective behavior in confined charged systems.