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Physics Colloquium and Semat Lecture: Roman Jackiw; "Fractional charge and Majorana excitations: The physics of zero-energy modes."

Physics Colloquium and Semat Lecture: Roman Jackiw; "Fractional charge and Majorana excitations: The physics of zero-energy modes."
When Apr 06, 2011
from 04:00 PM to 05:00 PM
Where SH95
Contact Name
Contact Phone 212-650-5572
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Physics Colloquium and Semat Lecture
 
Roman Jackiw
Jerold Zacharias Professor of Physics
Massachusetts Institute of Technology
 
"Fractional charge and Majorana excitations: The physics of zero-energy modes."
 
ABSTRACT:
 
 
Dirac paid close attention to the energy spectrum of the solutions to his equation, viz. the unwanted negative-energy states, and he developed a physical interpretation for them as oppositely charged anti-particles. Recently discussed and physically motivated deformations of the Dirac equation exhibit further unexpected states in the energy spectrum, viz. isolated zero-energy modes. We present a physical interpretation for these states as fermionic excitations carrying fractional charge, or no charge at all and they become Majorana fermions.
 
 
 
 
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