Tunable momentum pair creation of spin excitations in dipolar bilayers

authored by: Thomas Bilitewski, G. A. Domínguez-Castro, David Wellnitz, Ana Maria Rey, Luis Santos
Abstract: We study the temporal growth and spatial propagation of quantum correlations in a two-dimensional bilayer realizing a spin-1/2 quantum XXZ model with couplings mediated by long-range and anisotropic dipolar interactions. Starting with an initial state consisting of spins with opposite magnetization in each of the layers, we predict a dynamic instability that results, at short times, in the creation of correlated pairs of excitations at specific momenta at exponentially fast rates and entanglement between spatially separated modes. The momentum structure of the created pairs can be controlled via the dipolar orientation, the layer separation, or the dipolar couplings. The predicted behavior remains observable at very low filling fractions, making it accessible in state-of-the-art experiments with Rydberg atoms, magnetic atoms, and polar molecule arrays.
Organisation(s): Institute of Theoretical Physics
External Organisation(s): Oklahoma State University
JILA
University of Colorado Boulder
Type: Article
Journal: Physical Review A
Volume: 108
ISSN: 2469-9926
Publication date: 19.07.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics
Electronic version(s): https://doi.org/10.48550/arXiv.2302.09059 (Access: Open)
https://doi.org/10.1103/PhysRevA.108.013313 (Access: Closed)

BibTeX

@article{160b5f33ed1d45ebab6a87c997744b4b,
title = "Tunable momentum pair creation of spin excitations in dipolar bilayers",
abstract = "We study the temporal growth and spatial propagation of quantum correlations in a two-dimensional bilayer realizing a spin-1/2 quantum XXZ model with couplings mediated by long-range and anisotropic dipolar interactions. Starting with an initial state consisting of spins with opposite magnetization in each of the layers, we predict a dynamic instability that results, at short times, in the creation of correlated pairs of excitations at specific momenta at exponentially fast rates and entanglement between spatially separated modes. The momentum structure of the created pairs can be controlled via the dipolar orientation, the layer separation, or the dipolar couplings. The predicted behavior remains observable at very low filling fractions, making it accessible in state-of-the-art experiments with Rydberg atoms, magnetic atoms, and polar molecule arrays.",
author = "Thomas Bilitewski and Dom{\'i}nguez-Castro, {G. A.} and David Wellnitz and Rey, {Ana Maria} and Luis Santos",
note = "Funding Information: We acknowledge careful review of this manuscript and useful comments from A. Carroll and J. Higgins. G.A.D.-C. and L.S. acknowledge support of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy – EXC-2123 QuantumFrontiers – Grant No. 390837967. D.W. and A.M.R. acknowledge support from the AFOSR MURI, the ARO single investigator Award No. W911NF-19-1-0210, the NSF JILA-PFC PHY-1734006 grants, and the NSF QLCI-2016244 grants, by the US Department of Energy Quantum Systems Accelerator (QSA) grant and by NIST. ",
year = "2023",
month = jul,
day = "19",
doi = "10.48550/arXiv.2302.09059",
language = "English",
volume = "108",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "1",
}