Past Events
Reductionism, physics, mathematics and the mind
2020年5月22日 (金) 14:00General-audience geek-out Zoom talk.
Speaker: Yasha Neiman.
Title: "Reductionism, physics, mathematics and the mind".
Quantization of folded strings in non-critical dimensions
2020年5月18日 (月) 15:30 〜 17:00Title: Quantization of folded strings in non-critical dimensions
Speaker: Dorin Weissmann
Abstract: I will talk about some problems that arise when attempting to quantize rotating strings semiclassically, in the critical and non-critical dimensions. The problems are divergences associated with folding points in the string. A rotating closed string is a basic system that suffers from this problem, and I show how we deal with it by treating the fold as a boundary and placing mass terms there. Based on an upcoming paper with J. Sonnenschein.
The spiritual art of Calculus and the union of Heaven and Earth
2020年5月8日 (金) 14:00Seminar for general audience, about mankind's discovery of magic.
Speaker: Yasha Neiman.
Title: "The spiritual art of Calculus and the union of Heaven and Earth".
Clean hands and the Scientific Revolution
2020年4月23日 (木) 14:00General geek-out Zoom Webinar.
Speaker: Yasha Neiman.
Title: Clean hands and the Scientific Revolution.
[Seminar] "Aspects of ghost-free nonlocal field theories" by Dr. Luca Buoninfante
2020年3月9日 (月) 13:30 〜 14:30Speaker: Dr. Luca Buoninfante, Tokyo Institute of Technology
Theoretical Physics Seminar: Friederike Metz
2020年3月6日 (金) 14:00Theoretical Physics Seminar.
Speaker: Friederike Metz (Quantum Systems).
Title: "Precise temperature estimation with a single qubit as a probe".
Theoretical Physics Seminar: Deepak Bhat
2020年2月21日 (金) 14:00Theoretical Physics Seminar.
Speaker: Deepak Bhat (Biological Complexity).
Title: "Polarization and Consensus of Opinion: Causes and Characteristics".
[Seminar] "Spacetime Foam and the Cosmological Constant" by Prof. Steven Carlip
2020年2月20日 (木) 15:00 〜 16:00Speaker: Prof. Steven Carlip, University of California, Davis
Theoretical Physics Seminar: Riccardo Martini
2020年2月7日 (金) 14:00Theoretical Physics Seminar.
Speaker: Riccardo Martini (Gravity, Quantum Geometry and Field Theory).
Title: "Renormalization methods in quantum gravity".
Group Meeting Talk: BMS Symmetry and OPE of Celestial CFTs
2020年2月3日 (月) 15:30 〜 17:00Title : BMS Symmetry and OPE of Celestial CFTs
Speaker: Sudip Ghosh
Abstract: The holographic dual of quantum gravitational theories in asymptotically flat spacetimes has recently been conjectured to be the so called celestial conformal field theories whose correlation functions are Mellin transforms of bulk scattering amplitudes. In this talk I will discuss aspects of a derivation of the OPE in these CFTs from the collinear singularities of graviton scattering amplitudes and the constraints of BMS symmetries on the OPE coefficients.