1. Universal Quantum Computation in a Neutral Atom Decoherence Free Subspace
- Author
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Etienne Brion, Mark Saffman, Line Hjortshøj Pedersen, S. Chutia, and Klaus Mølmer
- Subjects
Physics ,Quantum Physics ,Quantum decoherence ,Dephasing ,Computation ,Physical system ,FOS: Physical sciences ,Topology ,Information theory ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Symmetry (physics) ,010305 fluids & plasmas ,Quantum mechanics ,0103 physical sciences ,Quantum Physics (quant-ph) ,010306 general physics ,Subspace topology ,Quantum computer - Abstract
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., 7 pages, 8 figures
- Published
- 2006