Fast Photon-Mediated Entanglement of Continuously Cooled Trapped Ions for Quantum Networking
We entangle two cotrapped atomic barium ion qubits by collecting single visible photons from each ion through in vacuo 0.8 NA objectives, interfering them through an integrated fiber beam splitter and detecting them in coincidence. This projects the qubits into an entangled Bell state with an observed fidelity lower bound of F>94%. We also introduce an ytterbium ion for sympathetic cooling to remove the need for recooling interruptions and achieve a continuous entanglement rate of 250 s^{-1}.
Authors
- Christopher R. Monroe (ORCID: https://orcid.org/0000-0003-0551-3713)
- Sagnik Saha
- George Toh (ORCID: https://orcid.org/0000-0002-5142-1919)
- Andrew Risinger (ORCID: https://orcid.org/0000-0002-9770-5175)
- Mikhail I. Shalaev (ORCID: https://orcid.org/0009-0008-6012-5012)
- Tingguang Li (ORCID: https://orcid.org/0009-0003-0097-2096)
- Jameson O’Reilly (ORCID: https://orcid.org/0000-0001-7798-5993)
- Allison L. Carter (ORCID: https://orcid.org/0000-0002-9040-5735)
- Isabella Goetting (ORCID: https://orcid.org/0009-0006-0938-3177)
- Ashish Kalakuntla
- Ashrit Verma
Institutions
- Duke University (US)
- Joint Quantum Institute (US)
- University of Maryland, College Park (US)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-08-30
- DOI
- https://doi.org/10.1103/physrevlett.133.090802
- Citations
- 18
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 6.25
Funders
- National Science Foundation
- U.S. Department of Energy