Abstract

Crystalline whispering gallery mode resonators (WGMRs) have been shown to facilitate versatile sources of quantum states that can efficiently interact with atomic systems. These features make WGMRs an efficient platform for quantum information processing. Here, we experimentally show that it is possible to generate polarization entanglement from WGMRs by using an interferometric scheme. Our scheme gives us the flexibility to control the phase of the generated entangled state by changing the relative phase of the interferometer. The S value of Clauser–Horne–Shimony–Holt’s inequality in the system is 2.45 ± 0.07, which violates the inequality by more than six standard deviations.

Details

Title
Polarization-entangled photons from a whispering gallery resonator
Author
Huang, Sheng-Hsuan 1   VIAFID ORCID Logo  ; Dirmeier, Thomas 1 ; Shafiee, Golnoush 1 ; Laiho, Kaisa 2 ; Strekalov, Dmitry V. 3 ; Leuchs, Gerd 1   VIAFID ORCID Logo  ; Marquardt, Christoph 1 

1  Max Planck Institute for the Science of Light, Erlangen, Germany (GRID:grid.419562.d) (ISNI:0000 0004 0374 4283); Friedrich-Alexander-Universität Erlangen-Nürnberg, Department of Physics, Erlangen, Germany (GRID:grid.5330.5) (ISNI:0000 0001 2107 3311) 
2  Institute of Quantum Technologies, German Aerospace Center (DLR e.V.), Ulm, Germany (GRID:grid.7551.6) (ISNI:0000 0000 8983 7915) 
3  Max Planck Institute for the Science of Light, Erlangen, Germany (GRID:grid.419562.d) (ISNI:0000 0004 0374 4283) 
Pages
85
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
20566387
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41534-024-00876-z
ProQuest document ID
3104347089
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.