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Entanglement of Two Individual Neutral Atoms Using Rydberg Blockade

T. Wilk, A. Gaëtan, C. Evellin, J. Wolters, Y. Miroshnychenko, P. Grangier, and A. Browaeys
Phys. Rev. Lett. 104, 010502 – Published 8 January 2010
Physics logo See Synopsis: Opening the gate to quantum computation

Abstract

We report the generation of entanglement between two individual Rb87 atoms in hyperfine ground states |F=1,M=1 and |F=2,M=2 which are held in two optical tweezers separated by 4μm. 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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  • Received 5 August 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.010502

©2010 American Physical Society

Synopsis

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Opening the gate to quantum computation

Published 19 January 2010

The demonstration of entanglement between two neutral atoms would be a key step toward using them for quantum computation.

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Authors & Affiliations

T. Wilk, A. Gaëtan, C. Evellin, J. Wolters, Y. Miroshnychenko, P. Grangier, and A. Browaeys

  • Laboratoire Charles Fabry, Institut d’Optique, CNRS, Univ Paris-Sud, Campus Polytechnique, RD 128, 91127 Palaiseau cedex, France

See Also

Demonstration of a Neutral Atom Controlled-NOT Quantum Gate

L. Isenhower, E. Urban, X. L. Zhang, A. T. Gill, T. Henage, T. A. Johnson, T. G. Walker, and M. Saffman
Phys. Rev. Lett. 104, 010503 (2010)

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Vol. 104, Iss. 1 — 8 January 2010

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