Entanglement of two individual neutral atoms using Rydberg blockade

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 ato...

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Bibliographic Details
Published in:Physical review letters 2010-01, Vol.104 (1), p.010502-010502, Article 010502
Main Authors: Wilk, T, Gaëtan, A, Evellin, C, Wolters, J, Miroshnychenko, Y, Grangier, P, Browaeys, A
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BOSONS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
GROUND STATES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MASSLESS PARTICLES
MOTION
NUCLEI
ODD-EVEN NUCLEI
PHOTONS
Physics
QUANTUM ENTANGLEMENT
Quantum Physics
RADIOISOTOPES
ROTATION
RUBIDIUM 87
RUBIDIUM ISOTOPES
RYDBERG STATES
YEARS LIVING RADIOISOTOPES
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.104.010502