University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Tuesday, April 7th 2015
4:30 pm:
CM Journal Club in 236A Tate
Speaker: Tianbai Cui
Subject: Majorana modes in solid-state systems

The concept of ‘Majorana fermions’, first proposed by Ettore Majorana that spin-1/2 particles could be their own antiparticles, is ubiquitous in modern physics nowadays. Majorana’s big idea was supposed to be solely relevant to high energy physics like neutrino, dark matter and supersymmetry. But now, his conjecture can not only be fulfilled in solid-state systems but also bring a promising future to the quantum information processing. In this talk, I will first introduce the historical background of Majorana fermions. Then I will bring the Majorana physics to solid-state systems by introducing two toy models that support Majorana modes. First is the Kitaev’s toy lattice model for 1D p-wave superconductor and the second is Fu-Kane model for 2D p+ip superconductor. Finally I will discussion the non-Abelian exchange statistics associated with the Majorana modes and their potential for quantum information processing.
Reference:
[1] J. Alicea, Reports on Progress in Physics, vol. 75, p. 076501, 2012.
[2] S. R. Elliott and M. Franz, Reviews of Modern Physics, vol. 87, pp. 137-163, 02/11/2015.
[3] A. Y. Kitaev, Physics-Uspekhi, vol. 44, p. 131, 2001.
[4] J. Alicea, Y. Oreg, G. Refael, F. von Oppen, and M. P. Fisher, Nature Physics, vol. 7, pp. 412-417, 2011.

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