Spin-chain-based full quantum computation by accessing only two spins

Koji Maruyama, Daniel Burgarth, Michael Murphy, Simone Montangero, Tommaso Calarco, Franco Nori, Martin B. Plenio

Research output: Contribution to journalArticlepeer-review


We apply quantum control techniques to a long spin chain by acting only on two qubits at one of its ends, thereby implementing universal quantum computation by a combination of quantum gates on these qubits and indirect SWAP operations across the chain. It is shown that the control sequences can be computed and implemented efficiently. We discuss the application of these ideas to physical systems such as superconducting qubits in which full control of long chains is challenging.
Original languageEnglish
Pages (from-to)169-172
Number of pages4
JournalAIP Conference Proceedings
Issue number1
Publication statusPublished - 2011
Externally publishedYes


  • Quantum computing
  • spin chains
  • limited access


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