2017 - 2018 HEP Seminar Schedule |
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Date | Event Type | Speaker | Title |
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09/06/2017 | HEP Seminar | Ennio Salvioni | Charged Composite Scalar Dark Matter [ + Description ] |

09/08/2017 | HEP Seminar | Ram Brustein | Whatâ€™s inside a BH? Probing the interior of black holes with gravity waves [ + Description ] |

09/13/2017 | HEP Seminar | Adam Solomon | Effective field theories and modified gravity or: How I learned to stop worrying and love higher-derivative Lagrangians [ + Description ] |

09/20/2017 | HEP Seminar | Giovanni Villadoro | The Power of Series [ + Description ] |

09/27/2017 | HEP Seminar | Savdeep Sethi | Supersymmetry Breaking by Fluxes [ + Description ] |

10/04/2017 | HEP Seminar | Patrick Fox | Cosmology in Mirror Twin Higgs and Neutrinos [ + Description ] |

10/11/2017 | HEP Seminar | Tomer Volansky | Relaxed Inflation [ + Description ] |

10/18/2017 | HEP Seminar | Cora Dvorkin | Discovering New Physics Beyond the Standard Model with Cosmological Data Sets [ + Description ] |

10/25/2017 | HEP Seminar | David Curtin | BSM Opportunities at ep Colliders [ + Description ] |

11/01/2017 | HEP Seminar | Tom Banks | Do Conformal Field Theory Correlators Compute the Non-perturbative Minkowski S Matrix? [ -- Description ] |

Description: I present two independent arguments that the answer to the question in the title is NO. The first involves the Tensor Network Renormalization Group approach to local physics in AdS space. I show that it provides a derivation of the Holographic Space-time (HST) formalism for the special case of AdS space, but only on scales of order the AdS radius or larger. For smaller scales (in models with a large radius gravity dual), TNRG does not reproduce the scrambling properties of small black holes. The HST formalism does reproduce those properties, but that physics is unconnected to the time evolution defined by the CFT Hamiltonian. An independent argument comes from the claim that the Minkowski scattering operator in never unitary in the Fock space of gravitons. This is manifestly true in four dimensions, where all Fock space matrix elements vanish, but true non-perturbatively in higher dimensions as well. CFT correlators can compute at most the finite Fock space matrix elements, when they exist. If time permits, I'll discuss the connection between these arguments. In HST the majority of states in a causal diamond in Minkowski space, describe "soft gravitons propagating on the boundary of the diamond" and the Hamiltonian of these states is invariant under volume preserving maps of the holographic screen of the diamond. In order to describe the conformal boundary of AdS space, the Hamiltonian for diamonds whose proper time is of order the AdS radius or larger must break this symmetry in order to properly converge to the boundary field theory Hamiltonian. This is naturally incorporated in the formalism of HST because the Hamiltonian is time dependent, reflecting the fact that the time slices are always taken to lie inside the past light cone of a point on a particular time-like trajectory. (2:00 PM, 726 Broadway, 940, CCPP Seminar) | |||

11/08/2017 | HEP Seminar | Tongyan Lin | Constraining a Thin Dark Matter Disk with Gaia [ + Description ] |

11/15/2017 | HEP Seminar | Jared Kaplan | Exact Bulk Operators and the Fate of Locality [ + Description ] |

11/22/2017 | HEP Seminar | Alexander Zhiboedov | Conformal Bootstrap At Large Charge [ + Description ] |

11/29/2017 | HEP Seminar | Michael R. Douglas | Computational complexity of cosmology in string theory [ + Description ] |

12/06/2017 | HEP Seminar | Sebastian Franco | Going Beyond Duality Using Branes [ + Description ] |

12/13/2017 | HEP Seminar | Erich Poppitz | Confinement and strings in circle-compactified gauge theories: 'same and different' [ + Description ] |

01/24/2018 | HEP Seminar | Thomas Bachlechner | Tunneling in Semi-Classical Gravity [ + Description ] |

01/31/2018 | HEP Seminar | Marcus Spradlin | TBA [ + Description ] |

02/01/2018 | HEP Seminar | Tanguy Pierog | LHC and Cosmic Rays : the Chicken or the Egg ? [ + Description ] |

02/07/2018 | HEP Seminar | Surjeet Rajendran | TBA [ + Description ] |

02/14/2018 | HEP Seminar | Clay Cordova | TBA [ + Description ] |

02/21/2018 | HEP Seminar | Xi Yin | TBA [ + Description ] |

02/28/2018 | HEP Seminar | Nima Arkani-Hamed | Marble Statues in the Forest Beyond Quantum Mechanics and Spacetime [ + Description ] |

03/07/2018 | HEP Seminar | Anastasia Volovich | TBA [ + Description ] |

05/09/2018 | HEP Seminar | Matthew Lippert | TBA [ + Description ] |