Polarization-entangled photons from a whispering gallery resonator
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.
Authors
- Thomas Dirmeier (ORCID: https://orcid.org/0000-0002-4935-9810)
- Christoph Marquardt (ORCID: https://orcid.org/0000-0002-5045-513X)
- Golnoush Shafiee
- Kaisa Laiho (ORCID: https://orcid.org/0000-0003-3090-8629)
- Gerd Leuchs (ORCID: https://orcid.org/0000-0003-1967-2766)
- Dmitry Strekalov (ORCID: https://orcid.org/0000-0001-6058-7390)
- Sheng-Hsuan Huang
Institutions
- Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
- Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) (DE)
- Max Planck Institute for the Science of Light (DE)
Publication Details
- Journal
- npj Quantum Information
- Published
- 2024-09-13
- DOI
- https://doi.org/10.1038/s41534-024-00876-z
- Citations
- 3
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 1.04
Funders
- Australian Government
- Bundesministerium für Bildung und Forschung