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dc.contributor.authorChen, Xiaotongen_US
dc.contributor.authorLu, Xinen_US
dc.contributor.authorDubey, Sudiptaen_US
dc.contributor.authorYao, Qiangen_US
dc.contributor.authorLiu, Shengen_US
dc.contributor.authorWang, Xingzhien_US
dc.contributor.authorXiong, Qihuaen_US
dc.contributor.authorZhang, Lifaen_US
dc.contributor.authorSrivastava, Ajiten_US
dc.identifier.citationChen, X., Lu, X., Dubey, S., Yao, Q., Liu, S., Wang, X., . . . Srivastava, A. (2019). Entanglement of single-photons and chiral phonons in atomically thin WSe2. Nature Physics, 15(3), 221-227. doi:10.1038/s41567-018-0366-7en_US
dc.description.abstractQuantum entanglement is a fundamental phenomenon that, on the one hand, reveals deep connections between quantum mechanics, gravity and spacetime 1,2 , and on the other hand, has practical applications as a key resource in quantum information processing 3 . Although it is routinely achieved in photon–atom ensembles 4 , entanglement involving solid-state 5–7 or macroscopic objects 8 remains challenging albeit promising for both fundamental physics and technological applications. Here, we report entanglement between collective, chiral vibrations in a two-dimensional WSe 2 host—chiral phonons (CPs)—and single-photons emitted from quantum dots 9–13 (QDs) present in it. CPs that carry angular momentum were recently observed in WSe 2 and are a distinguishing feature of the underlying honeycomb lattice 14,15 . The entanglement results from a ‘which-way’ scattering process, involving an optical excitation in a QD and doubly-degenerate CPs, which takes place via two indistinguishable paths. Our unveiling of entanglement involving a macroscopic, collective excitation together with strong interactions between CPs and QDs in two-dimensional materials opens up ways for phonon-driven entanglement of QDs and engineering chiral or non-reciprocal interactions at the single-photon level.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relation.ispartofNature Physicsen_US
dc.rights© 2018 The Author(s), under exclusive licence to Springer Nature Limited. All rights reserved. This paper was published in Nature Physics and is made available with permission of The Author(s), under exclusive licence to Springer Nature Limited.en_US
dc.titleEntanglement of single-photons and chiral phonons in atomically thin WSe2en_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.organizationNanoelectronics Centre of Excellenceen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsQuantum Dotsen_US
dc.subject.keywordsTwo-dimensional Materialsen_US
dc.description.acknowledgementWe acknowledge many enlightening discussions with A. Imamoğlu, W. Gao and M. Kroner. We also acknowledge technical help from T. Neal and E. Liu. A.S. acknowledges support from Emory University startup funds and the National Science LettersNATure PHySiCSFoundation through the EFRI Program grant number EFMA-1741691. L.Z. thanks M. Gao for helpful calculations and discussions, and acknowledges support from the National Natural Science Foundation of China (grant No. 11574154). Q.X. gratefully acknowledges strong support from the Singapore National Research Foundation via an NRF-ANR joint grant (NRF2017-NRF-ANR002 2D-Chiral) and the Singapore Ministry of Education via an AcRF Tier2 grant (MOE2017-T2-1-040) and Tier1 grants (RG 113/16 and RG 194/17)en_US
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