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Resilience of singlet-state extraction against non-optimal resonance conditions

  • Autori: Ciccarello, F.; Paternostro, M.; Kim, M.; Palma, G.
  • Anno di pubblicazione: 2008
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • Parole Chiave: quantum information theory, transport in mesoscopic systems
  • OA Link:


We have recently presented a protocol for extracting the singlet state of two non-interacting high-dimensional spins through post-selection of the internal state of interaction mediators sent in succession [F. Ciccarello et al., arXiv:0710.3855v1]. The scheme requires each mediator's wavevector to obey appropriate resonance conditions. Here we show the robustness of the scheme in the realistic case where such conditions are not sharply fulfilled.