Scalable quantum computation via local control of only two qubits

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

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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
Article number040303
Number of pages4
JournalPhysical Review A
Issue number4
Publication statusPublished - 22 Apr 2010


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