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Description | Speaker: Daniel Litim, University of Sussex (Visitor to Steve Carlip's quantum gravity class, giving a seminar open to all.) Room: 185 Host: Carlip Title: Interacting UV fixed points - from 4D quantum gauge theories to 4D quantum gravitation Abstract: It is commonly believed that a fundamental definition of quantum field theory requires the existence of an UV fixed point. Asymptotic freedom of QCD is the well-known example where the fixed point is non-interacting. In this talk, I provide a proof of existence for novel classes of 4D matter-gauge theories whose high-energy behaviour is governed by an interacting UV fixed point. In the absence of asymptotic freedom, scalars, fermions, and non-Abelian gauge fields cooperate in such a way that an interacting UV fixed point emerges. I discuss the key characteristics of these theories which are all under strict perturbative control. I also discuss recent advances and challenges to find interacting UV fixed points in 4D quantum gravity once couplings become strong. |

Date | Thu, February 5, 2015 |

Time | 6:20am-7:30am PST |

Duration | 1 hour 10 minutes |

Access | Public |

Created by | High-Energy Seminars |

Updated | Tue, February 3, 2015 1:05am PST |

Send Reminder | Yes - 0 days 4 hour 0 minutes before start |