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Towards Quantum Communication with Electron Spins

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2003

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Saraga, Daniel S.
Egues, Jose C.
Engel, Hans-Andreas
Recher, Patrik
Loss, Daniel

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Turkish Journal of Physics. 2003, 27(5), pp. 427-441. ISSN 1300-0101. eISSN 1303-6122

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We review our recent work towards quantum communication in a solid-state environment with qubits carried by electron spins. We propose three schemes to produce spin-entangled electrons, where the required separation of the partner electrons is achieved via Coulomb interaction. The non-product spin-states originate either from the Cooper pairs found in a superconductor, or in the ground state of a quantum dot with an even number of electrons. In a second stage, we show how spin-entanglement carried by a singlet can be detected in a beam-splitter geometry by an increased (bunching) or decreased (antibunching) noise signal. We also discuss how a local spin-orbit interaction can be used to provide a continuous modulation of the noise as a signature of entanglement. Finally, we review how one can use a quantum dot as a spin-filter, a spin-memory read-out, a probe for single-spin decoherence and, ultimately, a single-spin measurement apparatus.

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ISO 690SARAGA, Daniel S., Guido BURKARD, Jose C. EGUES, Hans-Andreas ENGEL, Patrik RECHER, Daniel LOSS, 2003. Towards Quantum Communication with Electron Spins. In: Turkish Journal of Physics. 2003, 27(5), pp. 427-441. ISSN 1300-0101. eISSN 1303-6122
BibTex
@article{Saraga2003Towar-29151,
  year={2003},
  title={Towards Quantum Communication with Electron Spins},
  number={5},
  volume={27},
  issn={1300-0101},
  journal={Turkish Journal of Physics},
  pages={427--441},
  author={Saraga, Daniel S. and Burkard, Guido and Egues, Jose C. and Engel, Hans-Andreas and Recher, Patrik and Loss, Daniel}
}
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