Subradiant Bell states in distant atomic arrays
Quantum Physics
2019-03-11 v2
Abstract
We study collective `free-space' radiation properties of two distant single-layer arrays of quantum emitters as two-level atoms. We show that this system can support a long-lived Bell superposition state of atomic excitations exhibiting strong subradiance, which corresponds to a non-local excitation of the two arrays. We describe the preparation of these states and their application in quantum information as resource of non-local entanglement, including deterministic quantum state transfer with high fidelity between the arrays representing quantum memories. We discuss experimental realizations using cold atoms in optical trap arrays with subwavelength spacing, and analyze the role of imperfections.
Cite
@article{arxiv.1901.02665,
title = {Subradiant Bell states in distant atomic arrays},
author = {P. -O. Guimond and A. Grankin and D. V. Vasilyev and B. Vermersch and P. Zoller},
journal= {arXiv preprint arXiv:1901.02665},
year = {2019}
}
Comments
5 + 12 pages, 3 + 6 figures