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Entanglement distillation using the exchange interaction

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2016

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Schwonnek, René
Dammeier, Lars
Werner, Reinhard F.

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https://doi.org/10.1007/s00340-015-6286-7
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Applied Physics B. 2016, 122(3), 51. ISSN 0946-2171. eISSN 1432-0649. Available under: doi: 10.1007/s00340-015-6286-7

Zusammenfassung

A key ingredient of quantum repeaters is entanglement distillation, i.e., the generation of high-fidelity entangled qubits from a larger set of pairs with lower fidelity. Here, we present entanglement distillation protocols based on qubit couplings that originate from exchange interaction. First, we make use of asymmetric bilateral two-qubit operations generated from anisotropic exchange interaction and show how to distill entanglement using two input pairs. We furthermore consider the case of three input pairs coupled through isotropic exchange. Here, we characterize a set of protocols which are optimizing the trade-off between the fidelity increase and the probability of a successful run.

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ISO 690AUER, Adrian, René SCHWONNEK, Christian SCHODER, Lars DAMMEIER, Reinhard F. WERNER, Guido BURKARD, 2016. Entanglement distillation using the exchange interaction. In: Applied Physics B. 2016, 122(3), 51. ISSN 0946-2171. eISSN 1432-0649. Available under: doi: 10.1007/s00340-015-6286-7
BibTex
@article{Auer2016-03-10Entan-33641,
  year={2016},
  doi={10.1007/s00340-015-6286-7},
  title={Entanglement distillation using the exchange interaction},
  number={3},
  volume={122},
  issn={0946-2171},
  journal={Applied Physics B},
  author={Auer, Adrian and Schwonnek, René and Schoder, Christian and Dammeier, Lars and Werner, Reinhard F. and Burkard, Guido},
  note={Article Number: 51}
}
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