Entangling bosons through particle indistinguishability and spatial overlap

Title
Entangling bosons through particle indistinguishability and spatial overlap
Authors
김용수조영욱임향택타누모이마리아나 바로스허준석진승범
Keywords
양자얽힘; 양자정보; 양자광학
Issue Date
2020-12
Publisher
Optics express
Citation
VOL 28, NO 25-38092
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/72542
ISSN
1094-4087
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KIST Publication > Article
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