In single-particle or intraparticle entanglement, two degrees of freedom of a single particle, e.g., momentum and polarization of a single photon, are entangled. Single-particle entanglement is a resource that can be exploited both in quantum communication protocols and in experimental tests of noncontextuality based on the Kochen-Specker theorem. Here we show that single-particle entangled states of single photons can be produced from attenuated classical sources of light. To experimentally certify the single-particle entanglement, we perform a Bell test, observing a violation of the Clauser, Horne, Shimony, and Holt inequality. We show that single-particle entanglement can be achieved even in a classical light beam, provided that first-order coherence is maintained between the degrees of freedom involved in the entanglement. This demonstrates that cheap, compact, and low-power photon sources can be used to generate single-particle entangled photons which could be a resource for quantum technology applications.

Bell inequality violation by entangled single-photon states generated from a laser, a LED or a Halogen lamp / Pasini, Matteo; Leone, Nicolo; Mazzucchi, Sonia; Moretti, Valter; Pastorello, Davide; Pavesi, Lorenzo. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 102:6(2020), pp. 063708.1-063708.15. [10.1103/PhysRevA.102.063708]

Bell inequality violation by entangled single-photon states generated from a laser, a LED or a Halogen lamp

Pasini, Matteo;Leone, Nicolo;Mazzucchi, Sonia;Moretti, Valter;Pastorello, Davide;Pavesi, Lorenzo
2020-01-01

Abstract

In single-particle or intraparticle entanglement, two degrees of freedom of a single particle, e.g., momentum and polarization of a single photon, are entangled. Single-particle entanglement is a resource that can be exploited both in quantum communication protocols and in experimental tests of noncontextuality based on the Kochen-Specker theorem. Here we show that single-particle entangled states of single photons can be produced from attenuated classical sources of light. To experimentally certify the single-particle entanglement, we perform a Bell test, observing a violation of the Clauser, Horne, Shimony, and Holt inequality. We show that single-particle entanglement can be achieved even in a classical light beam, provided that first-order coherence is maintained between the degrees of freedom involved in the entanglement. This demonstrates that cheap, compact, and low-power photon sources can be used to generate single-particle entangled photons which could be a resource for quantum technology applications.
6
Pasini, Matteo; Leone, Nicolo; Mazzucchi, Sonia; Moretti, Valter; Pastorello, Davide; Pavesi, Lorenzo
Bell inequality violation by entangled single-photon states generated from a laser, a LED or a Halogen lamp / Pasini, Matteo; Leone, Nicolo; Mazzucchi, Sonia; Moretti, Valter; Pastorello, Davide; Pavesi, Lorenzo. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 102:6(2020), pp. 063708.1-063708.15. [10.1103/PhysRevA.102.063708]
File in questo prodotto:
File Dimensione Formato  
AS12065 (1).pdf

accesso aperto

Tipologia: Post-print referato (Refereed author’s manuscript)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.08 MB
Formato Adobe PDF
1.08 MB Adobe PDF Visualizza/Apri
PhysRevA.102.063708.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.77 MB
Formato Adobe PDF
1.77 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/282586
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 5
social impact