Reductionism, physics, mathematics and the mind

General-audience geek-out Zoom talk.
Speaker: Yasha Neiman.
Title: "Reductionism, physics, mathematics and the mind".

Quantization of folded strings in non-critical dimensions

Title: 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

Seminar 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

General 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

Speaker: Dr. Luca Buoninfante, Tokyo Institute of Technology

Theoretical Physics Seminar: Friederike Metz

Theoretical Physics Seminar.
Speaker: Friederike Metz (Quantum Systems).
Title: "Precise temperature estimation with a single qubit as a probe".

Theoretical Physics Seminar: Deepak Bhat

Theoretical 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

Speaker: Prof. Steven Carlip, University of California, Davis

Theoretical Physics Seminar: Riccardo Martini

Theoretical 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

Title : 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.