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Phys. Rev. A 70, 032324 (2004) [7 pages]

Implementation of NMR quantum computation with parahydrogen-derived high-purity quantum states

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M. S. Anwar* and J. A. Jones†
Centre for Quantum Computation, Clarendon Laboratory, University of Oxford, Parks Road, OX1 3PU, United Kingdom

D. Blazina‡ and S. B. Duckett§
Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom

H. A. Carteret**
LITQ, Departement d’Informatique et Recherche Opérationelle, Pavillon André-Aisenstadt, Université de Montréal, Montréal, Québec H3C 3J7, Canada

Received 8 June 2004; published 24 September 2004

We demonstrate the implementation of a quantum algorithm on a liquid-state NMR quantum computer using almost pure states. This was achieved using a two-qubit device where the initial state is an almost pure singlet nuclear spin state of a pair of 1H nuclei arising from a chemical reaction involving parahydrogen. We have implemented Deutsch’s algorithm for distinguishing between constant and balanced functions with a single query.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.032324
DOI:
10.1103/PhysRevA.70.032324
PACS:
03.67.Lx, 82.56.−b, 03.67.Mn

*Electronic address: muhammad.anwar@physics.ox.ac.uk

†Electronic address: jonathan.jones@qubit.org

‡Electronic address: db30@york.ac.uk

§Electronic address: sbd3@york.ac.uk

**Electronic address: cartereh@iro.umontreal.ca

 
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