Astrophysics and Cosmology through Problems - 11A
Mark Wyman - PDT Partners LLC , Niayesh Afshordi - University of Waterloo
15709 - 15720 of 17984 Results
Format results
-
The Toric Code, Perturbed
Alastair Kay - University of London
The emergence of photons, electrons, and gravitons from quantum qbit systems
Xiao-Gang Wen - Massachusetts Institute of Technology (MIT) - Department of Physics
Physical Limits of Inference
David Wolpert - National Aeronautics and Space Administration
Cosmology of the Lee-Wick Model
Robert Brandenberger - McGill University - Department of Physics
Generating Tree Amplitudes in N=4 SYM and N=8 Super-Gravity
Dan Freedman - Massachusetts Institute of Technology (MIT)
Torsion and the Holography of Parity Breaking
Rob Leigh - University of Illinois Urbana-Champaign
Emergent spacetimes
Silke Weinfurtner - University of Nottingham
Astrophysics and Cosmology through Problems - 10B
Mark Wyman - PDT Partners LLC , Niayesh Afshordi - University of Waterloo
Astrophysics and Cosmology through Problems - 10A
Mark Wyman - PDT Partners LLC , Niayesh Afshordi - University of Waterloo
Charge Conjugation Monodromy Defects for Gauge Fields
Conformal surface defects are two-dimensional objects in four-dimensional quantum field theories that preserve part of the conformal symmetry. I will introduce them and the data that characterize them. An important class is monodromy defects, around which fields come back transformed by a symmetry…
Higher Dimensional Holography
Raquel Izquierdo Garcia
The holographic dictionary is well developed for gravity in asymptotically anti de Sitter A(AdS_{d+1}) spacetimes. However, this approach is limited, since many physically relevant configurations, such as bubbling geometries dual to heavy operators, do not arise as an uplift of a lower dimensional A…
QFT in 0 Dimensions
James Munday - Dalhousie University
I will study a toy model for QFT, which still captures the relevant mathematical structure. I will explain why quantum field theory arises as a deformation of classical field theory in this framework. I will also show how Feynman diagrams arise naturally as a form of homological integration.
Network-Irreducible Multiparty Entanglement in Quantum Matter
Pedro Nobrega Lauand - Instituto Federal de São Paulo - Campus Campinas
We show that the standard approach to characterize collective entanglement via genuine multiparty entanglement (GME) leads to an area law in ground and thermal Gibbs states of local Hamiltonians. To capture the truly collective part one needs to go beyond this short-range contribution tied to…
A no-go theorem for order-two Clifford electric-magnetic duality
Shunta Takahashi - Perimeter Institute for Theoretical Physics
Duality is ubiquitous across many branches of theoretical physics. One important example is electric-magnetic duality, familiar from the source-free Maxwell equations and also generalized in various settings to particle-vortex duality, Seiberg–Witten duality, and S-duality. However, these examples…
Principles of Quantum Optimization for Constrained Problems
Constrained combinatorial optimization underlies many industrial and technological decision problems. In this talk, I will present a spectral theory that unifies many quantum optimization algorithms. I will show that computational slowdown is driven by entanglement restructuring: the creation…
Wn minimal models from quantum groups
Suriyah Rajalingam Kannagi - Perimeter Institute for Theoretical Physics
We couple \(N\) flavors of one-dimensional fermions to \(SU(N)_k\) Chern–Simons theory and study their continuum limit. We conjecture that these systems flow to non-chiral interfaces in Chern–Simons theory, supporting a compact boson and a \(\mathcal W_N\) minimal model. Quantum groups provide an…
Beyond Noether: A Covariant Approach to Poisson-Lie Symmetries
Christopher Pollack - Perimeter Institute for Theoretical Physics
In this talk we will explore the idea of (global) Poisson-Lie group symmetries in field theory using a Lagrangian (covariant phase space) approach. Poisson-Lie groups are Lie groups endowed with a compatible Poisson bracket, and their action on symplectic manifolds (e.g. phase space) gives rise to a…
Seeing Page Curves with Blinders On
We will summarizes recent discussions of the Page curve and the information paradox. In quantum gravity the algebra of observables at infinity is complete, both in AdS and in asymptotically flat space. This completeness implies that the bulk Hilbert space in quantum gravity does not factorize along…
Boundary Data for Local Boundaries in General Relativity
Antonia Seifert - Perimeter Institute for Theoretical Physics
The initial-boundary value problem in general relativity has been the subject of extensive study. A central issue is the identification of boundary data and conditions on timelike boundaries that ensure well-posedness. In the work presented here, we approach the problem by considering perturbations…
Weyl-spinor gravity from a topological theory. Continuum and discrete
In this talk, I will present a formulation of gravity based on Weyl spinor–valued 1-forms. I will show how this formulation can be linked to a topological theory via symmetry breaking. Next, I will move on to the discretization of this topological theory, where the presence of 1-form-valued…