2006/03/24 by Li-Xiang Cen, Z. D. Wang, S. J. Wang · 38 citations
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Cold Atom Physics and Bose-Einstein Condensates #Computation #Computer science #Decoherence-free subspaces #Dephasing #Linear subspace #Mathematics #Physics #Quantum #Quantum Information and Cryptography #Quantum computer #Quantum decoherence #Quantum gate #Quantum mechanics #Quantum network #Quantum optics and atomic interactions #Scalability #Topology (electrical circuits) #quant-ph
paper · pdf · doi:10.1103/physreva.74.032321
published in Physical Review A 74(3) (American Physical Society) · 4 pages, 1 figure
arxiv created 2006/03/24 · openalex publication_date 2006/09/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a decoherence-free subspace (DFS) scheme to realize scalable quantum computation with trapped ions. The spin-dependent laser-ion coupling is exploited in the presence of Coulomb interactions. A universal set of unconventional geometric quantum gates is achieved in encoded subspaces that are immune from decoherence by collective dephasing. The scalability of the scheme for an ion-array system is demonstrated, either by adiabatically switching on and off the interactions, or by a fast gate scheme with DFS encoding and noise-decoupling techniques.