期刊
SCIENCE
卷 377, 期 6607, 页码 777-780出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abo5037
关键词
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资金
- Air Force Office of Scientific Research [FA9550-19-1-0250]
- Swiss National Science Foundation [185870]
- Deutsche Forschungsgemeinschaft (DFG
- German Research Foundation) [432680300/SFB 1456]
- Gottfried Wilhelm Leibniz program
- European Union [101017720]
- EU H2020 research and innovation program under the Marie Sklodowska-Curie IF [101033593]
- Max Planck Society
- Manfred Eigen Fellowship
- Marie Curie Actions (MSCA) [101033593] Funding Source: Marie Curie Actions (MSCA)
In this work, we show the preparation of electron-photon pair states by exploiting the phase-matched interaction between free electrons and the optical microresonator on a photonics chip. This breakthrough provides a foundation for the future development of free-electron quantum optics.
Quantum information, communication, and sensing rely on the generation and control of quantum correlations in complementary degrees of freedom. Free electrons coupled to photonics promise novel hybrid quantum technologies, although single-particle correlations and entanglement have yet to be shown. In this work, we demonstrate the preparation of electron-photon pair states using the phase-matched interaction of free electrons with the evanescent vacuum field of a photonic chip-based optical microresonator. Spontaneous inelastic scattering produces intracavity photons coincident with energy-shifted electrons, which we employ for noise-suppressed optical mode imaging. This parametric pair-state preparation will underpin the future development of free-electron quantum optics, providing a route to quantum-enhanced imaging, electron-photon entanglement, and heralded single-electron and Fock-state photon sources.
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