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DTSTART;TZID=America/New_York:20231026T150000
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SUMMARY:(Colloquium) Joe Kraisler\, Amherst College
DESCRIPTION:Colloquium Talk\nProfessor Joe Kraisler\, Amherst College\nThursday October 26\, 2023 at 3PM\nRocky 300 \n \nTitle: Topological Insulators and the SSH Model \nAbstract: Electronic band theory was one of the early 20th century achievements of quantum mechanics and placed solids into three categories: conductors\, semiconductors\, and insulators. However\, starting in the 1980s with the discovery of the Quantum Hall Effect\, a new phase of matter known as Topological Insulators (TIs) were theorized and eventually realized. These materials act as insulators in the interior\, or bulk\, while allowing electrons to freely move along the boundary\, or edge\, of the material. Additionally\, there is a relationship between the a) number of states which exist on the boundary and b) a property of the interior which is protected under small defects. This relationship is often referred to as the Bulk-Edge Correspondence. \nWe will study the simplest example of a 1-dimensional topological insulator\, the SSH (Su-Schrieffer-Heeger) model of polyacetylene\, and prove the bulk edge correspondence for this particular system. No previous physics knowledge is required.
URL:https://pages.vassar.edu/mathstats/event/colloquium-talk-2/
CATEGORIES:Colloquium
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