University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Thursday, September 11th 2014
1:25 pm:
Condensed Matter Seminar in 210 Physics
Speaker: Erez Berg, Weizmann Institute of Sciences, Israel
Subject: Coherent Transmutation of Electrons into Fractionalized Anyons

Electrons have three quantized properties – charge, spin, and Fermi
statistics – that are directly responsible for a vast array of
phenomena. Here we show how these properties can be coherently and
dynamically stripped from the electron as it enters certain exotic
states of matter known as quantum spin liquids (QSL). In a QSL,
electron spins collectively form a highly entangled quantum state that
gives rise to emergent gauge forces and fractionalization of spin,
charge, and statistics. We show that certain QSLs host distinct,
topologically robust boundary types, some of which allow the electron
to coherently enter the QSL as a fractionalized quasiparticle, leaving
its spin, charge, or statistics “at the door.” We use these ideas to
propose a number of universal, “smoking-gun” experimental signatures
that would establish fractionalization in QSLs.

Faculty Host: Andrey Chubukov

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