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APS » Journals » Phys. Rev. Lett. » Volume 85 » Issue 10
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Phys. Rev. Lett. 85, 2208–2211 (2000)

Fast Quantum Gates for Neutral Atoms

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D. Jaksch, J. I. Cirac, and P. Zoller
Institut für Theoretische Physik, Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria

S. L. Rolston
National Institute of Standards and Technology, Gaithersburg, Maryland 20899

R. Côté1 and M. D. Lukin2
1Physics Department, University of Connecticut, 2152 Hillside Road, Storrs, Connecticut 06269-3046
2ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138

Received 7 April 2000; published in the issue dated 4 September 2000

We propose several schemes for implementing a fast two-qubit quantum gate for neutral atoms with the gate operation time much faster than the time scales associated with the external motion of the atoms in the trapping potential. In our example, the large interaction energy required to perform fast gate operations is provided by the dipole-dipole interaction of atoms excited to low-lying Rydberg states in constant electric fields. A detailed analysis of imperfections of the gate operation is given.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.2208
DOI:
10.1103/PhysRevLett.85.2208
PACS:
03.67.Lx, 32.80.Pj, 32.80.Rm
 
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