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April 17: Onkar Parrikar (University of Pennsylvania)

Time: 2pm
Location: 2N36
 
Title: Entanglement Entropy in Chern-Simons Theory and Link Invariants

Abstract: We will study the entanglement structure of states in Chern-Simons (CS) theory obtained by performing the Euclidean path-integral on certain highly non-trivial 3-manifolds, namely link complements in S^3. The corresponding entanglement entropies in fact provide framing independent link-invariants. In U(1) CS theory, we will give a general formula for the entanglement entropy across a bi-partition of a generic n-link into sub-links. In the non-Abelian case, we study various interesting 2 & 3-links including the Whitehead link & Borromean rings, both of which have non-trivial entanglement structures. If time permits, we will mention connections with gravity and hyperbolic geometry. 

Date of event: 
Mon, 2017-04-17 (All day)