SEMINAR on Disorder and strong electron correlations: "Multiparticle interference in electronic Mach-Zehnder interferometers"

[CM ICTP - Trieste]

CONDENSED MATTER SECTION




SEMINAR on



Disorder and strong electron correlations



Thursday, 26 February      -  11:00 a.m.



Seminar Room,  Leonardo Building - first floor

  Dmitry KOVRIZHIN



( University of Oxford )



"Multiparticle interference in electronic

Mach-Zehnder interferometers"





Abstract



Electronic Mach-Zehnder interferometers were constructed recently  
from chiral one-dimensional integer quantum Hall edge states. These  
interferometers showed an unexpected behavior of the visibility of  
Aharonov-Bohm (AB) oscillations in the nonlinear regime, where the  
visibility developed a lobe structure accompanied by the $pi$-jumps  
of the AB-phase [1]. We address these phenomena by studying the model  
of a Mach-Zehnder interferometer, where the one-dimensional electrons  
interact via long-range potential. We calculate exactly the  
visibility of the Aharonov-Bohm oscillations in this model, which  
agrees well with experimental results.



[1] "Unexpected Behavior in a Two-Path Electron Interferometer", I.  
Neder, M. Heiblum, Y. Levinson, D. Mahalu, and V. Umansky, Phys. Rev.  
Lett. 96, 016804, (2006)