Entanglement of neutral-atom chains by spin-exchange Rydberg interaction
arXiv:1410.3372 · doi:10.1103/PhysRevA.90.062327
Abstract
Conditions to achieve an unusually strong Rydberg spin-exchange interaction are investigated and proposed as a means to generate pairwise entanglement and realize a SWAP-like quantum gate for neutral atoms. Ground-state entanglement is created by mapping entangled Rydberg states to ground states using optical techniques. A protocol involving SWAP gate and pairwise entanglement operations is predicted to create global entanglement of a chain of $N$ atoms in a time that is independent of $N$.
14 pages, 8 figures