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Tuesday, October 16th 2018

11:15 am:

Cold dense quark matter is a superfluid, but not quite the

familiar one we learned about in textbooks. Instead, it is a

"topologically-enriched" superfluid. I'll explain how to derive a

local effective action for this gapless phase of matter, which

involves coupling the superfluid to a topological quantum field theory

(TQFT). Along the way we'll talk about continuum "BF" actions for

four-dimensional discrete gauge theories, as well certain peculiar

five-dimensional cousins of these TQFTs relevant for our superfluids.

This talk is a more technical follow-up to a talk from two weeks ago,

but will be aimed to be followable by people who didn't attend the

first talk.

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