Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices

TL;DR

This paper investigates how cavity-mediated long-range interactions in spinor quantum optical lattices can alter magnetic properties and induce novel magnetic phases, with implications for quantum information processing.

Contribution

It introduces a theoretical model analyzing the impact of long-range cavity interactions on magnetic order in ultracold atoms, revealing new magnetic phases and competition effects.

Findings

Global interactions modify magnetic character

Antiferromagnetic phases emerge beyond natural conditions

Long-range interactions enable new quantum information mechanisms

Abstract

Quantum matter at ultra-low temperatures offers a testbed for analyzing and controlling desired properties in strongly correlated systems. Under typical conditions the nature of the atoms fixes the magnetic character of the system. Beyond classical light potentials leading to optical lattices and short range interactions, high-Q cavities introduce novel dynamics into the system via the quantumness of light. Here we propose a theoretical model and we analyze it using exact diagonalization and density matrix renormalization group simulations. We explore the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. Antiferromagnetic correlated bosonic matter emerges in conditions beyond to what nature typically provides. These allow new alternatives toward the design of robust mechanisms for quantum information purposes, exploiting the properties of magnetic phases of strongly correlated quantum matter.