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A quantum logic gate for free electrons

Löffler, Stefan; Schachinger, Thomas; Hartel, Peter; Lu, Peng-Han; Dunin-Borkowski, Rafal E.; Obermair, Martin 1; Dries, Manuel 1; Gerthsen, Dagmar 1; Schattschneider, Peter
1 Laboratorium für Elektronenmikroskopie (LEM), Karlsruher Institut für Technologie (KIT)


The topological charge $m$ of vortex electrons spans an infinite-dimensional Hilbert space. Selecting a two-dimensional subspace spanned by $m=±1$, a beam electron in a transmission electron microscope (TEM) can be considered as a quantum bit (qubit) freely propagating in the column. A combination of electron optical quadrupole lenses can serve as a universal device to manipulate such qubits at the experimenter's discretion. We set up a TEM probe forming lens system as a quantum gate and demonstrate its action numerically and experimentally. High-end TEMs with aberration correctors are a promising platform for such experiments, opening the way to study quantum logic gates in the electron microscope.

Volltext §
DOI: 10.5445/IR/1000161876
Veröffentlicht am 31.08.2023
DOI: 10.48550/arXiv.2209.07123
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Laboratorium für Elektronenmikroskopie (LEM)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2022
Sprache Englisch
Identifikator KITopen-ID: 1000161876
Umfang 9 S.
Vorab online veröffentlicht am 15.09.2022
Nachgewiesen in arXiv
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