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Link to original content: https://pubmed.ncbi.nlm.nih.gov/20366354
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. 2010 Jan 8;104(1):010502.
doi: 10.1103/PhysRevLett.104.010502. Epub 2010 Jan 8.

Entanglement of two individual neutral atoms using Rydberg blockade

T Wilk  1 , A Gaëtan, C Evellin, J Wolters, Y Miroshnychenko, P Grangier, A Browaeys
Affiliations

Entanglement of two individual neutral atoms using Rydberg blockade

T Wilk et al. Phys Rev Lett. .

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.

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