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Phys. Rev. Lett. 81, 2152–2155 (1998)

Experimental Quantum Error Correction

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D. G. Cory1, M. D. Price2, W. Maas3, E. Knill4, R. Laflamme4, W. H. Zurek4, T. F. Havel5, and S. S. Somaroo5
1Department of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
2Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts 02139
3Bruker Instruments Inc., 19 Fortune Drive, Billerica, Massachusetts 01821
4Los Alamos National Laboratory, Los Alamos, New Mexico 87545
5BCMP, Harvard Medical School, 240 Longwood Avenue, Boston, Massachusetts 02115

Received 9 February 1998; published in the issue dated 7 September 1998

Quantum error correction is required to compensate for the fragility of the state of a quantum computer. We report the first experimental implementations of quantum error correction and confirm the expected state stabilization. A precise analysis of the decay behavior is performed in alanine and a full implementation of the error correction procedure is realized in trichloroethylene. In NMR computing, however, a net improvement in the signal to noise would require very high polarization. The experiment implemented the three-bit code for phase errors using liquid state NMR.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.2152
DOI:
10.1103/PhysRevLett.81.2152
PACS:
03.67.-a, 02.70.-c, 03.65.Bz, 89.70.+c