N identical particles and one particle to entangle them all

Bruno Bellomo, Rosario Lo Franco, and Giuseppe Compagno
Phys. Rev. A 96, 022319 – Published 21 August 2017

Abstract

In quantum information, W states are a central class of multipartite entangled states because of their robustness against noise and their use in many quantum processes. Their generation, however, remains a demanding task whose difficulty increases with the number of particles. We report a simple scalable conceptual scheme where a single particle in an ancilla mode works as an entanglement catalyst of the W state for other N separated identical particles. A crucial aspect of the scheme, which exploits basically spatial indistinguishability, is its universality, being applicable without essential changes to both bosons and fermions. Our proposal represents a paradigm within the experimental preparation of many-particle entanglement based on quantum indistinguishability.

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  • Received 20 April 2017

DOI:https://doi.org/10.1103/PhysRevA.96.022319

©2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & Optical

Authors & Affiliations

Bruno Bellomo1, Rosario Lo Franco2,3,*, and Giuseppe Compagno3

  • 1Institut UTINAM - UMR 6213, CNRS, Observatoire des Sciences de l'Univers THETA, Université Bourgogne Franche-Comté, F-25000 Besançon, France
  • 2Dipartimento di Energia, Ingegneria dell'Informazione e Modelli Matematici, Università di Palermo, Viale delle Scienze, Edificio 9, 90128 Palermo, Italy
  • 3Dipartimento di Fisica e Chimica, Università di Palermo, via Archirafi 36, 90123 Palermo, Italy

  • *rosario.lofranco@unipa.it

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Issue

Vol. 96, Iss. 2 — August 2017

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