Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/145018
Title: Entanglement of single-photons and chiral phonons in atomically thin WSe2
Authors: Chen, Xiaotong
Lu, Xin
Dubey, Sudipta
Yao, Qiang
Liu, Sheng
Wang, Xingzhi
Xiong, Qihua
Zhang, Lifa
Srivastava, Ajit
Keywords: Science::Physics
Issue Date: 2018
Source: Chen, 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/s41567-018-0366-7
Journal: Nature Physics
Abstract: Quantum 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.
URI: https://hdl.handle.net/10356/145018
ISSN: 1745-2473
DOI: 10.1038/s41567-018-0366-7
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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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