Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 26: Focus Session Ultrafast Electron Microscopy at the Space-Time Limit III
O 26.9: Vortrag
Dienstag, 18. März 2025, 12:45–13:00, H2
From Electron-Photon Ghost Imaging Towards Entanglement Certification — •Alexander Preimesberger1,2, Sergei Bogdanov1,2, Phila Rembold1, Santiago Beltrán-Romero1,2, Dominik Hornof1,2, Isobel C Bicket1,2, Nicolai Friis1, Elizabeth Agudelo1, Dennis Rätzel3, and Philipp Haslinger1,2 — 1VCQ, Atominstitut, TU Wien, Vienna, Austria — 2USTEM, TU Wien, Vienna, Austria — 3ZARM, University of Bremen, Bremen, Germany
Time-resolved detection of single electrons and their associated cathodoluminescence (CL) photons enables the identification of coincident electron-photon pairs. We recently employed this technique to study the tight momentum correlations generated by coherent CL within a transmission electron microscope [1]. In this contribution, we demonstrate ghost imaging using electron-photon pairs in both near-field and far-field configurations. In photonic quantum optics, the ability to produce such images is used to investigate quantum entanglement in photon pairs [2]. We discuss how to translate this concept to electron-photon states and introduce a robust method to certify and quantify their entanglement using measurements in mutually unbiased bases.
[1] A. Preimesberger et al., arXiv:2409.12216 (2024). [2] R. S. Bennink et al., Phys. Rev. Lett. 92 (2004).
Keywords: Cathodoluminescence; Entanglement; Coincidence measurement; Ghost Imaging; Transition Radiation