Video URL

https://pirsa.org/17040005

Hamiltonian and Lagrangian perspectives on elliptic cohomology

Berwick-Evans, D. (2017). Hamiltonian and Lagrangian perspectives on elliptic cohomology. Perimeter Institute for Theoretical Physics. https://pirsa.org/17040005

Berwick-Evans, Daniel. Hamiltonian and Lagrangian perspectives on elliptic cohomology. Perimeter Institute for Theoretical Physics, Apr. 10, 2017, https://pirsa.org/17040005 

          @misc{ scivideos_PIRSA:17040005,
            doi = {10.48660/17040005},
            url = {https://pirsa.org/17040005},
            author = {Berwick-Evans, Daniel},
            keywords = {Mathematical physics},
            language = {en},
            title = {Hamiltonian and Lagrangian perspectives on elliptic cohomology},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {apr},
            note = {PIRSA:17040005 see, \url{https://scivideos.org/pirsa/17040005}}
          }

Daniel Berwick-Evans University of Illinois Urbana-Champaign

DOI 10.48660/17040005
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

The physics proof of the Atiyah-Singer index theorem relates the Hamiltonian and Lagrangian approaches to quantization of N=1 supersymmetric mechanics. Similar ideas applied to the N=(0,1) supersymmetric sigma model construct two versions of elliptic cohomology: elliptic cohomology at the Tate curve over the integers and the universal elliptic cohomology theory over the complex numbers. Quantization procedures give analytic constructions of wrong-way maps in these cohomology theories. Relating these to the Ando-Hopkins-Strickland-Rezk string orientation of topological modular points to intricate torsion invariants associated with these sigma models.