Special Seminar | |

Topic: | Bordism, QFT, and a topological invariant of certain lattice systems |

Speaker: | Daniel Freed |

Affiliation: | University of Texas, Austin; Member, School of Mathematics and Natural Sciences |

Date: | Thursday, February 19 |

Time/Room: | 10:30am - 11:30am/Physics Library, Bloomberg Hall 201 |

Many features of Wick-rotated field theory are captured by an axiomatization using bordisms of smooth manifolds. There are many variations which have been extensively studied, particularly for conformal and topological field theories. I will give an introduction to this point of view, which has applications to ordinary quantum field theories as well. The application in this talk is to the classification of "invertible" gapped phases in condensed matter physics.