Efficient linear-optical generation of a multipartite W state

Pawel Blasiak, Ewa Borsuk, Marcin Markiewicz, and Yong-Su Kim
Phys. Rev. A 104, 023701 – Published 3 August 2021

Abstract

A scheme is presented for generation of a multipartite W state for an arbitrary number of qubits. Based on a recent proposal of entanglement without touching, it serves to demonstrate the potential of particle indistinguishability as a useful resource of entanglement for practical applications. The devised scheme is efficient in design, meaning that it is built with linear optics without the need for auxiliary particles nor measurements. Yet, the success probability is shown to be highly competitive compared with the existing proposals (i.e., decreases polynomially with the number of qubits) and remains insensitive to particle statistics (i.e., has the same efficiency for bosons and fermions).

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  • Received 2 March 2021
  • Accepted 12 July 2021

DOI:https://doi.org/10.1103/PhysRevA.104.023701

©2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Pawel Blasiak1,2,*, Ewa Borsuk1,†, Marcin Markiewicz3,‡, and Yong-Su Kim4,5,§

  • 1Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland
  • 2City, University of London, London EC1V 0HB, United Kingdom
  • 3International Centre for Theory of Quantum Technologies, University of Gdańsk, PL-80308 Gdańsk, Poland
  • 4Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
  • 5Division of Nano & Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea

  • *pawel.blasiak@ifj.edu.pl
  • ewa.borsuk@ifj.edu.pl
  • marcinm495@gmail.com
  • §yong-su.kim@kist.re.kr

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Issue

Vol. 104, Iss. 2 — August 2021

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