Conveners
W2-2 Fields, Particles, and Strings II (DTP) | Champs, particules et cordes II (DPT)
- Arundhati Dasgupta
The finite element method is a well-known technique to approximate solutions of partial differential equations on complex geometries. In this talk, I consider the quantization of the classical finite element method as applied to a scalar field propagating on a closed spatial manifold equipped with a random triangulation. This is intended to be a toy model of quantized matter inhabiting the...
It was recently showed that the dual to the vector space of Feynman
integrals have a very physical interpretation through unitary cuts. In
this talk, we want to use this new technology to answer questions at
two-loop. In particular, we initiate the loop-by-loop program and
investigate the recursive loop-structure of the ‘watermelon’
diagram, which is relevant for self-energy calculations...
Topological defects, such as monopoles, cosmic strings and domain walls, have been extensively studied in theories with fields minimally coupled to gravity. With the surging interest in alternative gravity theories, it is interesting to investigate the novel characteristics of defects in theories with non-minimally coupled strings. Previous works in this filed have already yielded interesting...
Gravitational waves (GWs) provide a new window to observe the universe. Detecting GWs requires an understanding of the interaction of GWs with the matter. In this view, we discuss the interaction of gravitational waves with SU(2) Yang-Mills waves. In particular, we discuss how a Yang-Mills wave gets modified in the background of a gravitational wave. We also discuss some of the implications of...
Quantum Effective Field Theory (EFT) in curved spacetime is our most advanced and established framework on the path towards a quantum theory of gravity. However, unlike its flat space counterpart, the theory lacks a unique notion of vacuum or energy, which complicates decoupling from ultraviolet (UV) degrees of freedom. Here, we present an EFT quantization procedure based on the...
