Interaction Induced Dephasing of Edge States

  • Ivan Levkivskyi
Part of the Springer Theses book series (Springer Theses)


We propose a physical model which describes dephasing in the electronic Mach-Zehnder interferometer and explains recent experimental results. According to our model, dephasing in the interferometer originates from strong Coulomb interaction at the edge of two-dimensional electron gas. The long-range character of the interaction leads to a separation of the spectrum of edge excitations on slow and fast mode. These modes are excited by electron tunneling and carry away the phase information. The new energy scale associated with the slow mode determines the temperature dependence of the visibility and the period of its oscillations as a function of voltage bias. Moreover, the variation of the lobe structure from one experiment to another is explained by specific charging effects, which are different in all experiments.


Slow Mode Edge Channel Quantum Point Contact Outer Channel Quantum Hall System 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of Theoretical PhysicsUniversity of GenevaGenevaSwitzerland

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