Quantum state interrogation using a preshaped free electron wavefunction
Abstract
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 is based on free electrons, whose quantum electron wavefunction is preshaped or optically modulated by lasers in an electron microscope setup and then inelastically scattered by a quantum TLS target (e.g., atom, quantum dot, and crystal defect center) upon traversing in proximity to the target. Measurement of the postinteraction energy spectrum of the electrons probes and quantifies the full Bloch sphere 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 horizons for electron microscopy in material interrogation and quantum information technology.
Additional Information
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. (Received 16 December 2021; accepted 10 June 2022; published 25 July 2022) We acknowledge helpful communications with O. Kfir, Y. M. Pan, and F. J. Garcia de Abajo. This paper was supported by the Israel Science Foundation under Grant No. 00010001000, the National Natural Science Foundation of China under Grant No. 12104068, and the Natural Science Foundation of Chongqing under Grant No. cstc2021jcyj-msxmX0684. D.R. acknowledges support by the Planning and Budgeting Committee program of the Israel Council of Higher Education. A.G., A.Y., J.S., and D.R. conceived the concept. B.Z. and D.R. performed the theoretical derivations and prepared the figures and videos. B.Z., D.R., and A.G. wrote the paper with contributions from R.I. and A.F. All authors reviewed and discussed the manuscript and made significant contributions to it.Attached Files
Published - PhysRevResearch.4.033071.pdf
Supplemental Material - Movie_S1.mp4
Supplemental Material - Movie_S2.mp4
Supplemental Material - Movie_S3-1.mp4
Supplemental Material - Movie_S3-2.mp4
Supplemental Material - Movie_S4.mp4
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Additional details
- Eprint ID
- 115865
- Resolver ID
- CaltechAUTHORS:20220726-998115000
- Israel Science Foundation
- 00010001000
- National Natural Science Foundation of China
- 12104068
- Natural Science Foundation of Chongqing
- cstc2021jcyj-msxmX0684
- Planning and Budgeting Committee I-CORE Program
- Created
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2022-07-27Created from EPrint's datestamp field
- Updated
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2022-07-27Created from EPrint's last_modified field