Analysis of a quantum logic device based on dipole-dipole interactions of optically trapped Rydberg atoms

Abstract

We present a detailed analysis and design of a neutral atom quantum logic device based on atoms in optical traps interacting via dipole-dipole coupling of Rydberg states. The dominant physical mechanisms leading to decoherence and loss of fidelity are enumerated. Our results support the feasibility of performing single and two-qubit gates at MHz rates with decoherence probability and fidelity errors at the level of $10^{-3}$ for each operation. Current limitations and possible approaches to further improvement of the device are discussed.

23 pages, 14 figures, typos corrected

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• A neutral atom quantum register
• Zeros of Rydberg-Rydberg Foster Interactions
• Applicability of Rydberg atoms to quantum computers
• Perfect initialization of a quantum computer of neutral atoms in an optical lattice of large lattice constant

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