Universal Quantum Computation using Exchange Interactions and Teleportation of Single-Qubit Operations

Details Universal Quantum Computation using Exchange Interactions and Teleportation of Single-Qubit Operations Universal Quantum Computation using Exchange Interactions and Teleportation of Single-Qubit Operations

2002-08-17

arxiv.org/abs/quant-ph/0208118v1

Phys. Rev. A 67, 050303 (2003)

Physics

Quantum Physics

4.5 pages, including 2 figures

Scientific paper

10.1103/PhysRevA.67.050303

We show how to construct a universal set of quantum logic gates using control over exchange interactions and single- and two-spin measurements only. Single-spin unitary operations are teleported instead of being executed directly, thus eliminating a major difficulty in the construction of several of the most promising proposals for solid-state quantum computation, such as spin-coupled quantum dots, donor-atom nuclear spins in silicon, and electrons on helium. Contrary to previous proposals dealing with this difficulty, our scheme requires no encoding redundancy. We also discuss an application to superconducting phase qubits.

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