Quantum Computation with a One-Dimensional Optical Lattice

Abstract

We present an economical dynamical control scheme to perform quantum computation on a one dimensional optical lattice, where each atom encodes one qubit. The model is based on atom tunneling transitions between neighboring sites of the lattice. They can be activated by external laser beams resulting in a two-qubit phase gate or in an exchange interaction. A realization of the Toffoli gate is presented which requires only a single laser pulse and no individual atom addressing.

4 pages, 4 figures, REVTEX. v3: clarifications on Toffoli gate, version to appear in Phys. Rev. Lett

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