Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics II

Q 31.62: Poster

Tuesday, March 24, 2015, 17:00–19:00, C/Foyer

Microwave guiding of free electrons and interaction-free measurements — •Sebastian Thomas, Jakob Hammer, Philipp Weber, and Peter Hommelhoff — Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 1, 91058 Erlangen

We discuss the guiding of free electrons on a chip using microwave fields and applications of this technique [1]. In particular, we intend to use it for studying an electron-based “interaction-free measurement”, an interferometric scheme that makes it possible to detect the presence of an object with minimal disturbance of the object. Realizing this scheme with electrons may enable a large reduction of radiation damage in electron microscopy [2]. As basic building blocks of electron interference experiments, we show the design of an electron beam splitter [3] and an electron mirror based on the microwave guide. Additionally, we discuss the performance of interaction-free measurements in the determination of transparency and phase shifts [4].

[1] J. Hoffrogge, R. Fröhlich, M. Kasevich, P. Hommelhoff, Phys. Rev. Lett. 106, 193001 (2011)

[2] W. Putnam, M. Yanik, Phys. Rev. A 80, 040902 (2009)

[3] J. Hammer, S. Thomas, P. Weber, P. Hommelhoff, arXiv: 1408.2658 (2014)

[4] S. Thomas, C. Kohstall, P. Kruit, P. Hommelhoff, Phys. Rev. A 90, 053840 (2014)