Interaction effects of pseudospin-based magnetic monopoles and kinks in a doped dipolar superlattice gas

TL;DR

This paper investigates the coexistence and interactions of magnetic monopoles and kinks in a doped dipolar superlattice gas, revealing confinement effects, dispersion renormalization, and dynamical deconfinement phenomena.

Contribution

It introduces a novel study of monopole-kink interactions in a pseudospin chain within an atomic dipolar superlattice gas, highlighting new confinement and deconfinement effects.

Findings

Revealed confinement effect between monopole and kink.

Observed renormalization of kink dispersion.

Documented dynamical deconfinement via kink-antikink annihilation.

Abstract

Magnetic monopoles and kinks are topological excitations extensively investigated in quantum spin systems, but usually they are studied in different setups. We explore the conditions for the coexistence and the interaction effects of these quasiparticles in the pseudospin chain of the atomic dipolar superlattice gas. In this chain, the magnetic kink is the intrinsic quasiparticle, and the particle/hole defect takes over the role of the north/south magnetic monopole, exerting monopolar magnetic fields to neighboring spins. A confinement effect between the monopole and kink is revealed, which renormalizes the dispersion of the kink. The corresponding dynamical deconfinement process is observed and arises due to the kink-antikink annihilation. The rich interaction effects of the two quasiparticles could stimulate corresponding investigations in bulk spin systems.