Entangling three identical particles via spatial overlap

Donghwa Lee, Tanumoy Pramanik, Seongjin Hong, Young Wook Cho, Hyang Tag Lim, Seungbeom Chin, Yong Su Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Quantum correlations between identical particles are at the heart of quantum technologies. Several studies with two identical particles have shown that the spatial overlap and indistinguishability between the particles are necessary for generating bipartite entanglement. On the other hand, researches on the extension to more than two-particle systems are limited by the practical difficulty to control multiple identical particles in laboratories. In this work, we propose schemes to generate two fundamental classes of genuine tripartite entanglement, i.e., GHZ and W classes, which are experimentally demonstrated using linear optics with three identical photons. We also show that the tripartite entanglement class decays from the genuine entanglement to the full separability as the particles become more distinguishable from each other. Our results support the prediction that particle indistinguishability is a fundamental element for entangling identical particles.

Original languageEnglish
Pages (from-to)30525-30535
Number of pages11
JournalOptics Express
Issue number17
Publication statusPublished - 2022 Aug 15

Bibliographical note

Funding Information:
Funding. Korea Institute of Science and Technology (2E31021); MSIP/IITP (2020-0-00947, 2020-0-00972); National Research Foundation of Korea (2019M3E4A1079777, 2019R1A2C2006381, 2019R1I1A1A01059964, 2021R1C1C1003625).

Publisher Copyright:
© 2022 Optica Publishing Group.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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