Entangling bosons through particle indistinguishability and spatial overlap

Mariana R. Barros, Seungbeom Chin, Tanumoy Pramanik, Hyang Tag Lim, Young Wook Cho, Joonsuk Huh, Yong Su Kim

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Particle identity and entanglement are two fundamental quantum properties that work as major resources for various quantum information tasks. However, it is still a challenging problem to understand the correlation of the two properties in the same system. While recent theoretical studies have shown that the spatial overlap between identical particles is necessary for nontrivial entanglement, the exact role of particle indistinguishability in the entanglement of identical particles has never been analyzed quantitatively before. Here, we theoretically and experimentally investigate the behavior of entanglement between two bosons as spatial overlap and indistinguishability simultaneously vary. The theoretical computation of entanglement for generic two bosons with pseudospins is verified experimentally in a photonic system. Our results show that the amount of entanglement is a monotonically increasing function of both quantities. We expect that our work provides an insight into deciphering the role of the entanglement in quantum networks that consist of identical particles.

Original languageEnglish
Pages (from-to)38083-38092
Number of pages10
JournalOptics Express
Issue number25
Publication statusPublished - 2020 Dec 7

Bibliographical note

Funding Information:
Korea Institute of Science and Technology (2E30620); Institute for Information and Communications Technology Promotion (2020-0-00947, 2020-0-00972); National Research Foundation of Korea (2015R1A6A3A04059773, 2019M3E4A1079526, 2019M3E4A1079666, 2019R1A2C2006381, 2019R1I1A1A01059964).

Publisher Copyright:
© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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