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Four new Simons Emmy Noether fellows announced
The Simons Emmy Noether Fellows Program at Perimeter honours the legacy of Emmy Noether, a brilliant researcher whose work made profound impacts on the landscape of physics and mathematics. The...
Spectral gaps without frustration
In quantum spin systems, the existence of a spectral gap above the ground state has strong implications for the low-energy physics. We survey recent results establishing spectral gaps in various...
Nov 13, 2019
SU(2) gauge theory on digital quantum computers
Results from the first digital quantum simulation of an SU(2) gauge theory are presented. This was done by analytically constructing gauge-invariant states and implementing a Trotterized time evolution operator for...
Nov 14, 2019
The Diamond Lemma for (multiplicative) preprojective algebras
Bergman's Diamond Lemma for ring theory gives an algorithm to produce a (non-canonical) basis for a ring presented by generators and relations. After demonstrating this algorithm in concrete, geometrically-minded examples...
Nov 14, 2019
Backreactions in Quantum Cosmological Perturbation Theory
Cosmological perturbation theory has a long tradition for describing the early phases of the Universe. As the observations of the CMB radiation suggest, it is reasonable, at least as a...
Nov 14, 2019
Planckian discreteness as a solution of Hawking's information puzzle
In approaches to quantum gravity, where smooth spacetime is an emergent approximation of a discrete Planckian fundamental structure, any standard effective field theoretical description will miss part of the degrees...
Nov 15, 2019
Neutrino mass and cosmic flows
Neutrinos are established to be massive and the mass differences have been measured, but the absolute neutrino mass values remain unknown. Cosmic neutrinos with finite mass slightly suppress the matter...
Nov 19, 2019
The VisIt Visualization Toolkit
VisIt ( https://wci.llnl.gov/simulation/computer-codes/visit/ ) is an interactive, powerful visualization, animation, and analysis tool. VisIt is an open source and available for Unix, Windows or Mac users. In this tutorial, after...
Nov 19, 2019
Non-invertible anomalies and Topological orders
It has been realized that anomalies can be classified by topological phases in one higher dimension. Previous studies focus on ’t Hooft anomalies of a theory with a global symmetry...
Nov 19, 2019
Ideal tetrahedra and their duals
Recently they have been generalized to other 3d homogeneous spaces, namely 3d anti de Sitter space and half-pipe space, a 3d homogeneous space with a degenerate metric. We show that...
Nov 20, 2019