Entanglement of photons in their dual wave-particle nature
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Polino, Emanuele
Man, Zhong-Xiao
An, Nguyen Ba
Xia, Yun-Jie
Spagnolo, Nicolo
Lo Franco, Rosario
Sciarrino, Fabio
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Abstract
Wave-particle duality is the most fundamental description of the nature of a quantum object, which behaves like a classical particle or wave depending on the measurement apparatus. On the other hand, entanglement represents nonclassical correlations of composite quantum systems, being also a key resource in quantum information. Despite the very recent observations of wave-particle superposition and entanglement, whether these two fundamental traits of quantum mechanics can emerge simultaneously remains an open issue. Here we introduce and experimentally realize a scheme that deterministically generates entanglement between the wave and particle states of two photons. The elementary tool allowing this achievement is a scalable single-photon setup which can be in principle extended to generate multiphoton wave-particle entanglement. Our study reveals that photons can be entangled in their dual wave-particle behavior and opens the way to potential applications in quantum information protocols exploiting the wave-particle degrees of freedom to encode qubits.
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Nature Communications
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8
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© The Author(s) 2017. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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Classical physics
Particle physics
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
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Rab, AS; Polino, E; Man, Z-X; An, NB; Xia, Y-J; Spagnolo, N; Lo Franco, R; Sciarrino, F, Entanglement of photons in their dual wave-particle nature, Nature Communications, 2017, 8, pp. 915