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Phys. Rev. A 70, 012306 (2004) [14 pages]

Quantum computations with atoms in optical lattices: Marker qubits and molecular interactions

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T. Calarco1,2, U. Dorner1, P. S. Julienne3, C. J. Williams3, and P. Zoller1
1Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria
2European Centre for Theoretical Studies in Nuclear Physics and Related Areas, I-38050 Villazzano (TN), Italy and CRS BEC-INFM, Dipartimento di Fisica, Università di Trento, I-38050 Povo (TN), Italy
3National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8423, USA

Received 27 March 2004; published 12 July 2004

We develop a scheme for quantum computation with neutral atoms, based on the concept of “marker” atoms, i.e., auxiliary atoms that can be efficiently transported in state-independent periodic external traps to operate quantum gates between physically distant qubits. This allows for relaxing a number of experimental constraints for quantum computation with neutral atoms in microscopic potential, including single-atom laser addressability. We discuss the advantages of this approach in a concrete physical scenario involving molecular interactions.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.70.012306
DOI: 10.1103/PhysRevA.70.012306
PACS: 0.3.67.−a, 34.50.−s

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