Amending entanglement-breaking channels via intermediate unitary operations

Á Cuevas, A. De Pasquale, A. Mari, A. Orieux, S. Duranti, M. Massaro, A. Di Carli, E. Roccia, J. Ferraz, F. Sciarrino, P. Mataloni, V. Giovannetti

Research output: Contribution to journalArticle

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11 Downloads (Pure)

Abstract

We report a bulk optics experiment demonstrating the possibility of restoring the entanglement distribution through noisy quantum channels by inserting a suitable unitary operation (filter) in the middle of the transmission process. We focus on two relevant classes of single-qubit channels consisting in repeated applications of rotated phase-damping or rotated amplitude-damping maps, both modeling the combined Hamiltonian and dissipative dynamics of the polarization state of single photons. Our results show that interposing a unitary filter between two noisy channels can significantly improve entanglement transmission. This proof-of-principle demonstration could be generalized to many other physical scenarios where entanglement-breaking communication lines may be amended by unitary filters.

Original languageEnglish
Article number022322
Number of pages5
JournalPhysical Review A
Volume96
Issue number2
DOIs
Publication statusPublished - 23 Aug 2017

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filters
damping
communication
optics
photons
polarization

Keywords

  • quantum communication channels
  • single qubit channels
  • single photons

Cite this

Cuevas, Á., De Pasquale, A., Mari, A., Orieux, A., Duranti, S., Massaro, M., ... Giovannetti, V. (2017). Amending entanglement-breaking channels via intermediate unitary operations. Physical Review A, 96(2), [022322]. https://doi.org/10.1103/PhysRevA.96.022322
Cuevas, Á ; De Pasquale, A. ; Mari, A. ; Orieux, A. ; Duranti, S. ; Massaro, M. ; Di Carli, A. ; Roccia, E. ; Ferraz, J. ; Sciarrino, F. ; Mataloni, P. ; Giovannetti, V. / Amending entanglement-breaking channels via intermediate unitary operations. In: Physical Review A. 2017 ; Vol. 96, No. 2.
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Cuevas, Á, De Pasquale, A, Mari, A, Orieux, A, Duranti, S, Massaro, M, Di Carli, A, Roccia, E, Ferraz, J, Sciarrino, F, Mataloni, P & Giovannetti, V 2017, 'Amending entanglement-breaking channels via intermediate unitary operations', Physical Review A, vol. 96, no. 2, 022322. https://doi.org/10.1103/PhysRevA.96.022322

Amending entanglement-breaking channels via intermediate unitary operations. / Cuevas, Á; De Pasquale, A.; Mari, A.; Orieux, A.; Duranti, S.; Massaro, M.; Di Carli, A.; Roccia, E.; Ferraz, J.; Sciarrino, F.; Mataloni, P.; Giovannetti, V.

In: Physical Review A, Vol. 96, No. 2, 022322, 23.08.2017.

Research output: Contribution to journalArticle

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AU - Mari, A.

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AU - Duranti, S.

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AU - Di Carli, A.

AU - Roccia, E.

AU - Ferraz, J.

AU - Sciarrino, F.

AU - Mataloni, P.

AU - Giovannetti, V.

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Cuevas Á, De Pasquale A, Mari A, Orieux A, Duranti S, Massaro M et al. Amending entanglement-breaking channels via intermediate unitary operations. Physical Review A. 2017 Aug 23;96(2). 022322. https://doi.org/10.1103/PhysRevA.96.022322