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  Dephasing by electron-electron interactions in a ballistic Mach-Zehnder interferometer

Neuenhahn, C., & Marquardt, F. (2008). Dephasing by electron-electron interactions in a ballistic Mach-Zehnder interferometer. New Journal of Physics, 10: 115018. doi:10.1088/1367-2630/10/11/115018.

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 Creators:
Neuenhahn, Clemens1, Author
Marquardt, Florian1, 2, Author              
Affiliations:
1University of Munich, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: We consider a ballistic Mach-Zehnder interferometer for electrons propagating chirally in one dimension (such as in an integer quantum Hall effect edge channel). In such a system, dephasing occurs when the finite range of the interaction potential is taken into account. Using the tools of bosonization, we discuss the decay of coherence as a function of propagation distance and energy. We supplement the exact solution by a semiclassical approach that is physically transparent and is exact at high energies. In particular, we study in more detail the recently predicted universal power-law decay of the coherence at high energies, where the exponent does not depend on the interaction strength. In addition, we compare against Keldysh perturbation theory, which works well for small interaction strength at short propagation distances.

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Language(s): eng - English
 Dates: 2008-11-20
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1088/1367-2630/10/11/115018
 Degree: -

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Title: New Journal of Physics
  Abbreviation : New J. Phys.
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 10 Sequence Number: 115018 Start / End Page: - Identifier: ISSN: 1367-2630
CoNE: https://pure.mpg.de/cone/journals/resource/954926913666