title: Demonstration of a neutral atom controlled-NOT quantum gate.
abstract: We present the first demonstration of a CNOT gate between two individually addressed neutral atoms. Our implementation of the CNOT uses Rydberg blockade interactions between neutral atoms held in optical traps separated by >8 microm. Using two different gate protocols we measure CNOT fidelities of F=0.73 and 0.72 based on truth table probabilities. The gate was used to generate Bell states with fidelity F=0.48+/-0.06. After correcting for atom loss we obtain an a posteriori entanglement fidelity of F=0.58.
authors.affiliation: Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706 USA.
authors.forename: L
authors.initials: L
authors.lastname: Isenhower
authors.forename: E
authors.initials: E
authors.lastname: Urban
authors.forename: X L
authors.initials: XL
authors.lastname: Zhang
authors.forename: A T
authors.initials: AT
authors.lastname: Gill
authors.forename: T
authors.initials: T
authors.lastname: Henage
authors.forename: T A
authors.initials: TA
authors.lastname: Johnson
authors.forename: T G
authors.initials: TG
authors.lastname: Walker
authors.forename: M
authors.initials: M
authors.lastname: Saffman