Momentum-selective pair creation of spin excitations in dipolar bilayers

• DOI: 10.48550/arxiv.2302.09059
• Publication Date: 2023-01-01
• Authors: Thomas Bilitewski; G. A. Domínguez‐C...; David Wellnitz; Ana María Rey; L. Santos
• Keywords: Momentum (technical analysis); Spin quantum number

We study the temporal growth and spatial propagation of quantum correlations in a two-dimensional bilayer realising spin-1/2 XXZ model with couplings mediated by long-range anisotropic dipolar interactions. Starting an initial state consisting spins opposite magnetization each layers, we predict emergence momentum-dependent dynamic instability spin structure factor that results, at short times, creation pairs excitations exponentially fast rates. The created present characteristic momentum distribution can be tuned controlling orientation, layer separation or couplings. predicted behavior remains observable very low filling fractions, making it accessible state-of-the-art experiments Rydberg atoms, magnetic polar molecule arrays.