Photonic Quantum State Tomography Using Free Electrons
The tomography of photonic quantum states is key in quantum optics, impacting quantum sensing, computing, and communication. Conventional detectors are limited in their temporal and spatial resolution, hampering high-rate quantum communication and local addressing of photonic circuits. Here, we propose to utilize free electron-photon interactions for quantum state tomography, introducing electron homodyne detection with potential for femtosecond-temporal and nanometer-spatial resolutions. The detectable quantum information level depends on the electron-photon interaction strength. Our Letter opens avenues for free-electron-based photodetection utilizing the ultrafast, subwavelength, nondestructive nature of free electrons.
Authors
- Avi Pe’er (ORCID: https://orcid.org/0000-0002-2813-7194)
- Ido Kaminer (ORCID: https://orcid.org/0000-0003-2691-1892)
- Alexey Gorlach (ORCID: https://orcid.org/0000-0002-0347-7141)
- Arnon Karnieli (ORCID: https://orcid.org/0000-0001-8065-9793)
- Raphael Dahan (ORCID: https://orcid.org/0000-0001-8931-1822)
- Eliahu Cohen (ORCID: https://orcid.org/0000-0001-6198-0725)
- Salomon Malka
Institutions
- Bar-Ilan University (IL)
- Technion – Israel Institute of Technology (IL)
- Stanford University (US)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-12-20
- DOI
- https://doi.org/10.1103/physrevlett.133.250801
- Citations
- 7
- Primary Topic
- Advanced Electron Microscopy Techniques and Applications
- Type
- article
- Field-Weighted Citation Impact
- 3.65
Funders
- Gordon and Betty Moore Foundation
- Israel Science Foundation