Scalable Ion Trap Quantum Computation with Pairwise Interactions Only

Details Scalable Ion Trap Quantum Computation with Pairwise Interactions Only Scalable Ion Trap Quantum Computation with Pairwise Interactions Only

2002-07-26

arxiv.org/abs/quant-ph/0207155v2

Physics

Quantum Physics

4 pages, 2 figures, submitted to PRA, minor changes

Scientific paper

Universal ion trap computation on Decoherence Free Subspaces (DFS) using only two qubit operations is presented. The DFS is constructed for the collective dephasing model. Encoded single and two-qubit logical operations are implemented via the Sorensen-Molmer interaction. Alternation of the effective Hamiltonians for two particular phase configurations of control fields approximates an anisotropic exchange interaction. This is universal over suitable encodings of one logical qubit into three physical qubits which are also DFS under collective decoherence.

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