Indistinguishability of Elementary Systems as a Resource for Quantum Information Processing

Rosario Lo Franco and Giuseppe Compagno
Phys. Rev. Lett. 120, 240403 – Published 14 June 2018
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Abstract

Typical elements of quantum networks are made by identical systems, which are the basic particles constituting a resource for quantum information processing. Whether the indistinguishability due to particle identity is an exploitable quantum resource remains an open issue. Here we study independently prepared identical particles showing that, when they spatially overlap, an operational entanglement exists that can be made manifest by means of separated localized measurements. We prove this entanglement is physical in that it can be directly exploited to activate quantum information protocols, such as teleportation. These results establish that particle indistinguishability is a utilizable quantum feature and open the way to new quantum-enhanced applications.

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  • Received 18 December 2017
  • Revised 14 March 2018

DOI:https://doi.org/10.1103/PhysRevLett.120.240403

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Rosario Lo Franco1,2,* and Giuseppe Compagno2

  • 1Dipartimento di Energia, Ingegneria dell’Informazione e Modelli Matematici, Università di Palermo, Viale delle Scienze, Edificio 9, 90128 Palermo, Italy
  • 2Dipartimento di Fisica e Chimica, Università di Palermo, via Archirafi 36, 90123 Palermo, Italy

  • *rosario.lofranco@unipa.it

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Issue

Vol. 120, Iss. 24 — 15 June 2018

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