Entangling free electrons and optical excitations
- URL: http://arxiv.org/abs/2202.00604v1
- Date: Tue, 1 Feb 2022 17:50:03 GMT
- Title: Entangling free electrons and optical excitations
- Authors: Andrea Kone\v{c}n\'a, Fadil Iyikanat, and F. Javier Garc\'ia de Abajo
- Abstract summary: We propose a scheme to generate pure entanglement between designated optical excitations in a cavity and separable free-electron states.
Specifically, we shape the electron wave-function profile to dramatically reduce the number of accessible cavity modes.
We exemplify this concept through a theoretical description of free-electron entanglement with degenerate and nondegenerate plasmon modes in silver nanoparticles and atomic vibrations in an inorganic molecule.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The inelastic interaction between flying particles and optical nanocavities
gives rise to entangled states in which some excitations of the latter are
paired with changes in the energy or momentum of the former. In particular,
entanglement of free electrons and nanocavity modes opens appealing
opportunities associated with the strong interaction capabilities of the
electrons. However, the degree of entanglement that is currently achievable by
electron interaction with optical cavities is severely limited by the lack of
external selectivity over the resulting state mixtures. Here, we propose a
scheme to generate pure entanglement between designated optical excitations in
a cavity and separable free-electron states. Specifically, we shape the
electron wave-function profile to dramatically reduce the number of accessible
cavity modes and simultaneously associate them with targeted electron
scattering directions. We exemplify this concept through a theoretical
description of free-electron entanglement with degenerate and nondegenerate
plasmon modes in silver nanoparticles as well as atomic vibrations in an
inorganic molecule. The generated entanglement can be further propagated
through its electron component to extend quantum interactions beyond currently
explored protocols.
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