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Quantum state interrogation using a preshaped free electron wavefunction

Zhang, Bin and Ran, Du and Ianconescu, Reuven and Friedman, Aharon and Scheuer, Jacob and Yariv, Amnon and Gover, Avraham (2022) Quantum state interrogation using a preshaped free electron wavefunction. Physical Review Research, 4 (3). Art. No. 033071. ISSN 2643-1564. doi:10.1103/physrevresearch.4.033071.

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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.

Item Type:Article
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URLURL TypeDescription
Zhang, Bin0000-0001-8655-5303
Ran, Du0000-0003-3604-7102
Ianconescu, Reuven0000-0002-9134-2377
Friedman, Aharon0000-0003-3786-6118
Scheuer, Jacob0000-0003-2116-6547
Gover, Avraham0000-0002-6132-9462
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.
Funding AgencyGrant Number
Israel Science Foundation00010001000
National Natural Science Foundation of China12104068
Natural Science Foundation of Chongqingcstc2021jcyj-msxmX0684
Planning and Budgeting Committee I-CORE ProgramUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20220726-998115000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115865
Deposited By: George Porter
Deposited On:27 Jul 2022 20:17
Last Modified:27 Jul 2022 20:17

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