Filters
5918 results
The Present Expansion rate of the Universe, Evidence of New Physics?
The Hubble constant remains one of the most important parameters in the cosmological model, setting the size and age scales of the Universe. Present uncertainties in the cosmological model including...
Sep 04, 2019
Mutliplicative Bell inequalities
Bell inequalities are important tools in contrasting classical and quantum behaviors. To date, most Bell inequalities are linear combinations of statistical correlations between remote parties. Nevertheless, finding the classical and...
Sep 04, 2019
Spacetime and higher-spin symmetries in the de Sitter S-matrix
I will discuss the problem of an observer's S-matrix in de Sitter space, i.e. the mapping between fields on the initial and final horizons of a de Sitter static patch...
Sep 05, 2019
Dynamical constraints on RG flows and cosmology
In QFT, the renormalization group is usually formulated in Euclidean signature. I will discuss time-dependent probes of the RG, in Lorentzian signature, and derive new dynamical constraints that govern the...
Sep 09, 2019
Employee giving
Perimeter's breakthroughs to date have been advanced by an ever-growing group of both public and private donors. As a world-leading centre for fundamental research, scientific training, and educational outreach, we...
Introduction to the Julia programming language (Erik Schnetter)
Julia is a modern programming language that is (so they say) as easy to use as Python and as fast as Fortran, combined with the expressive power of Lisp. I...
Sep 10, 2019
Inversion-protected higher-order topological superconductivity in monolayer WTe2
Monolayer WTe2, an inversion-symmetric transition metal dichalcogenide, has recently been established as a quantum spin Hall insulator and found superconducting upon gating. Here we show that generally a superconducting inversion-symmetric...
Sep 10, 2019
Quantum simulation logic, oracles, and the quantum advantage
Query complexity is a common tool for comparing quantum and classical computation, and it has produced many examples of how quantum algorithms differ from classical ones. Here we investigate in...
Sep 10, 2019
The Simplicity of Quantum Mechanics
The Simplicity of Quantum Mechanics
Sep 11, 2019
The representation theory of Clifford tensor-powers, from Howe to How
Schur-Weyl duality, arising from tensor-power representations of the unitary group, is a big useful hammer in the quantum information toolbox. This is especially the case for problems which have a...
Sep 12, 2019