Kavli Affiliate: Amnon Yariv
| First 5 Authors: Bin Zhang, Du Ran, Reuven Ianconescu, Aharon Friedman, Jacob Scheuer
| Summary:
We present a comprehensive theory for interrogation of the quantum state of a
two-level system (TLS) based on a free-electron bound-electron resonant
interaction scheme. The scheme comprises free electrons, whose quantum electron
wavefunction is pre-shaped or optically modulated by lasers in an electron
microscope and are scattered by a quantum TLS target (e.g. atom, quantum dot,
crystal defect center, etc.) upon traversing in proximity to the target.
Measurement of the post-interaction energy spectrum of the electrons, probes
and quantifies the full Bloch sphere qubit parameters of a pre-excited TLS and
enables coherent control of the qubit states. The exceptional advantage of this
scheme over laser-based ones is atomic-scale spatial resolution of addressing
individual TLS targets. Thus, this scheme opens new horizons for electron
microscopy in material interrogation and quantum information technology.
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