A Magnetic Resonance Realization of Decoherence-Free Quantum Computation

Details A Magnetic Resonance Realization of Decoherence-Free Quantum Computation A Magnetic Resonance Realization of Decoherence-Free Quantum Computation

2003-02-24

arxiv.org/abs/quant-ph/0302175v2

Phys. Rev. Lett. 91, 217904 (2003)

Physics

Quantum Physics

5 pages with 3 figures, revtex4, accepted by Physical Review Letters; v2 minor revisions to content

Scientific paper

10.1103/PhysRevLett.91.217904

We report the realization, using nuclear magnetic resonance techniques, of the first quantum computer that reliably executes an algorithm in the presence of strong decoherence. The computer is based on a quantum error avoidance code that protects against a class of multiple-qubit errors. The code stores two decoherence-free logical qubits in four noisy physical qubits. The computer successfully executes Grover's search algorithm in the presence of arbitrarily strong engineered decoherence. A control computer with no decoherence protection consistently fails under the same conditions.

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