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Science. 2010 Jul 30;329(5991):542-4. doi: 10.1126/science.1189075. Epub 2010 Jul 01.

Single-shot readout of a single nuclear spin.

Science (New York, N.Y.)

Philipp Neumann, Johannes Beck, Matthias Steiner, Florian Rempp, Helmut Fedder, Philip R Hemmer, Jörg Wrachtrup, Fedor Jelezko

Affiliations

  1. 3rd Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, Stuttgart 70550, Germany.

PMID: 20595582 DOI: 10.1126/science.1189075

Abstract

Projective measurement of single electron and nuclear spins has evolved from a gedanken experiment to a problem relevant for applications in atomic-scale technologies like quantum computing. Although several approaches allow for detection of a spin of single atoms and molecules, multiple repetitions of the experiment that are usually required for achieving a detectable signal obscure the intrinsic quantum nature of the spin's behavior. We demonstrated single-shot, projective measurement of a single nuclear spin in diamond using a quantum nondemolition measurement scheme, which allows real-time observation of an individual nuclear spin's state in a room-temperature solid. Such an ideal measurement is crucial for realization of, for example, quantum error correction protocols in a quantum register.

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