Universal quantum computation with the exchange interaction

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2000
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Di Vincenzo, David P.
Bacon, David
Kempe, Julia
Whaley, K. Brigitta
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Nature ; 408 (2000). - S. 339-342. - ISSN 0028-0836. - eISSN 1476-4687
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Various physical implementations of quantum computers are being investigated, although the requirements1 that must be met to make such devices a reality in the laboratory at present involve capabilities well beyond the state of the art. Recent solid-state approaches have used quantum dots2, donor-atom nuclear spins3 or electron spins4; in these architectures, the basic two-qubit quantum gate is generated by a tunable exchange interaction between spins (a Heisenberg interaction), whereas the one-qubit gates require control over a local magnetic field. Compared to the Heisenberg operation, the one-qubit operations are significantly slower, requiring substantially greater materials and device complexity—potentially contributing to a detrimental increase in the decoherence rate. Here we introduced an explicit scheme in which the Heisenberg interaction alone suffices to implement exactly any quantum computer circuit. This capability comes at a price of a factor of three in additional qubits, and about a factor of ten in additional two-qubit operations. Even at this cost, the ability to eliminate the complexity of one-qubit operations should accelerate progress towards solid-state implementations of quantum computation1.
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ISO 690DI VINCENZO, David P., David BACON, Julia KEMPE, Guido BURKARD, K. Brigitta WHALEY, 2000. Universal quantum computation with the exchange interaction. In: Nature. 408, pp. 339-342. ISSN 0028-0836. eISSN 1476-4687. Available under: doi: 10.1038/35042541
BibTex
@article{DiVincenzo2000Unive-29158,
  year={2000},
  doi={10.1038/35042541},
  title={Universal quantum computation with the exchange interaction},
  volume={408},
  issn={0028-0836},
  journal={Nature},
  pages={339--342},
  author={Di Vincenzo, David P. and Bacon, David and Kempe, Julia and Burkard, Guido and Whaley, K. Brigitta}
}
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