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# Universal quantum computation with the exchange interaction

Type of Publication: | Journal article |

Author: | Di Vincenzo, David P.; Bacon, David; Kempe, Julia; Burkard, Guido; Whaley, K. Brigitta |

Year of publication: | 2000 |

Published in: | Nature ; 408 (2000). - pp. 339-342. - ISSN 0028-0836. - eISSN 1476-4687 |

DOI (citable link): | https://dx.doi.org/10.1038/35042541 |

Summary: |
Various physical implementations of quantum computers are being investigated, although the requirements
^{1} 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 dots^{2}, donor-atom nuclear spins^{3} or electron spins^{4}; 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 computation^{1}. |

Subject (DDC): | 530 Physics |

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DI 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

@article{DiVincenzo2000Unive-29158, title={Universal quantum computation with the exchange interaction}, year={2000}, doi={10.1038/35042541}, 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} }