Universal Quantum Computation in a Neutral Atom Decoherence Free Subspace

Details Universal Quantum Computation in a Neutral Atom Decoherence Free Subspace Universal Quantum Computation in a Neutral Atom Decoherence Free Subspace

2006-11-24

arxiv.org/abs/quant-ph/0611246v1

Phys. Rev. A 75, 032328 (2007)

Physics

Quantum Physics

7 pages, 8 figures

Scientific paper

In this paper, we propose a way to achieve protected universal computation in a neutral atom quantum computer subject to collective dephasing. Our proposal relies on the existence of a Decoherence Free Subspace (DFS), resulting from symmetry properties of the errors. After briefly describing the physical system and the error model considered, we show how to encode information into the DFS and build a complete set of safe universal gates. Finally, we provide numerical simulations for the fidelity of the different gates in the presence of time-dependent phase errors and discuss their performance and practical feasibility.

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