title: Entanglement of two individual neutral atoms using Rydberg blockade.
abstract: We report the generation of entanglement between two individual 87Rb atoms in hyperfine ground states |F=1,M=1> and |F=2,M=2> which are held in two optical tweezers separated by 4 microm. Our scheme relies on the Rydberg blockade effect which prevents the simultaneous excitation of the two atoms to a Rydberg state. The entangled state is generated in about 200 ns using pulsed two-photon excitation. We quantify the entanglement by applying global Raman rotations on both atoms. We measure that 61% of the initial pairs of atoms are still present at the end of the entangling sequence. These pairs are in the target entangled state with a fidelity of 0.75.
authors.affiliation: Laboratoire Charles Fabry, Institut d'Optique, CNRS, Univ Paris-Sud, Campus Polytechnique, RD 128, 91127 Palaiseau cedex, France.
authors.forename: T
authors.initials: T
authors.lastname: Wilk
authors.forename: A
authors.initials: A
authors.lastname: Gaëtan
authors.forename: C
authors.initials: C
authors.lastname: Evellin
authors.forename: J
authors.initials: J
authors.lastname: Wolters
authors.forename: Y
authors.initials: Y
authors.lastname: Miroshnychenko
authors.forename: P
authors.initials: P
authors.lastname: Grangier
authors.forename: A
authors.initials: A
authors.lastname: Browaeys