Quantum Computing with Spatially Delocalized Qubits

J. Mompart, K. Eckert, W. Ertmer, G. Birkl, and M. Lewenstein
Phys. Rev. Lett. 90, 147901 – Published 8 April 2003

Abstract

We analyze the operation of quantum gates for neutral atoms with qubits that are delocalized in space, i.e., the computational basis states are defined by the presence of a neutral atom in the ground state of one out of two trapping potentials. The implementation of single-qubit gates as well as a controlled phase gate between two qubits is discussed and explicit calculations are presented for rubidium atoms in optical microtraps. Furthermore, we show how multiqubit highly entangled states can be created in this scheme.

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  • Received 1 October 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.147901

©2003 American Physical Society

Authors & Affiliations

J. Mompart1,2, K. Eckert1, W. Ertmer3, G. Birkl3, and M. Lewenstein1

  • 1Institute of Theoretical Physics, University of Hannover, Appelstrasse 2, D-30167 Hannover, Germany
  • 2Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
  • 3Institute of Quantum Optics, University of Hannover, Welfengarten 1, D-30167 Hannover, Germany

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Issue

Vol. 90, Iss. 14 — 11 April 2003

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