Elastic Recoil Imprinted on Free-electron Radiation
- URL: http://arxiv.org/abs/2312.04383v1
- Date: Thu, 7 Dec 2023 15:52:24 GMT
- Title: Elastic Recoil Imprinted on Free-electron Radiation
- Authors: Xihang Shi, Lee Wei Wesley Wong, Sunchao Huang, LiangJie Wong, Ido
Kaminer
- Abstract summary: We identify a fundamentally distinct phenomenon of electron radiation that bypasses this energy disparity.
This phenomenon arises from free-electron elastic recoil, which can influence fundamental radiation processes.
These quantum radiation features could guide the development of compact coherent X-ray sources facilitated by nanophotonics and quantum optics.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Free-electron radiation phenomena are treated almost exclusively with
classical electrodynamics, despite the intrinsic interaction being that of
quantum electrodynamics. The lack of quantumness arises from the vast disparity
between the electron energy and the much smaller photon energy, creating a
small cross-section that makes quantum effects negligible. Here we identify a
fundamentally distinct phenomenon of electron radiation that bypasses this
energy disparity, and thus displays extremely strong quantum features. This
phenomenon arises from free-electron elastic recoil, which can influence
fundamental radiation processes in ways thought so far to necessitate inelastic
scattering. The underlying reason for the quantum radiation features, which
have no counterparts in classical theory, is the entanglement between each
elastically recoiled electron and the photons it emitted. We show that this
phenomenon is more accessible than all other types of quantum features in
free-electron radiation and can be detected in current experimental setups such
as electron microscopes. These quantum radiation features could guide the
development of compact coherent X-ray sources facilitated by nanophotonics and
quantum optics.
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