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 ] |

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 ] |

Description: In this seminar I will carefully discuss the solution of the following problem in semi-classical quantum gravity. Consider an object of small mass in a locally Schwarzschild-de Sitter spacetime (Hubble parameter H_A). The object is located in an apparatus that forms a bubble of Hubble parameter H_B, separated via a thin domain wall from the original spacetime. Classically, this domain wall will expand to a finite size and eventually re-collapse. Quantum mechanically, the domain wall can tunnel through a forbidden region and expand indefinitely, leaving the object in a de Sitter region of Hubble parameter H_B, while the apparatus remains unaffected during the quantum transition. The Hamiltonian of a gravitational theory vanishes. I will discuss the quasi-local energy and how it relates to the boundary conditions. I evaluate the probability for tunneling to occur, both for H_A larger and smaller than H_B. The probability can increases with increasing Hubble scale within the bubble. I discuss this naive contradiction with entropy arguments, which would suggest that transitions to a higher entropy (smaller Hubble scale) are favored. (2:00 PM, 726 Broadway, 940, CCPP Seminar) | |||

01/31/2018 | HEP Seminar | Marcus Spradlin | Two Exercises in Supersymmetric SYK Models [ + 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 | Cosmological Solutions to the Problems of Existence [ + Description ] |

02/14/2018 | HEP Seminar | Clay Cordova | Applications of the Average Null Energy Condition [ + Description ] |

02/21/2018 | HEP Seminar | Xi Yin | Topological defect lines and RG flows in 2D [ + Description ] |

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

03/21/2018 | HEP Seminar | Victor Gorbenko | TBA [ + Description ] |

03/28/2018 | HEP Seminar | Ahmed Almheir | TBA [ + Description ] |

04/04/2018 | HEP Seminar | Anastasia Volovich | Singularities of Scattering Amplitudes from Geometry [ + Description ] |

04/11/2018 | HEP Seminar | Netta Engelhardt | TBA [ + Description ] |

04/18/2018 | HEP Seminar | Matthias Neubert | [ + Description ] |

04/25/2018 | HEP Seminar | Bernd-Jochen Schaefer | Strongly interacting matter under extreme conditions: Different phases of QCD [ + Description ] |

05/02/2018 | HEP Seminar | Mikhail Ivanov | TBA [ + Description ] |

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

05/16/2018 | HEP Seminar | TBA | [ + Description ] |