Theory of Cosmological Perterbations - Lecture 3, Part 1
Robert Brandenberger - McGill University - Department of Physics
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The Art of Mathematics
Ellen Kaplan - Harvard University , Robert Kaplan - Harvard University
Challenges for Theories of Fundamental Physics from Cosmology - Part 2
Robert Brandenberger - McGill University - Department of Physics
Challenges for Theories of Fundamental Physics from Cosmology - Part 1
Robert Brandenberger - McGill University - Department of Physics
Theory of Cosmological Perterbations - Final
Robert Brandenberger - McGill University - Department of Physics
Was there a Big Bang?
Robert Brandenberger - McGill University - Department of Physics
The Science of Time
Fay Dowker - Imperial College London
Superselection Rules and Quantum Protocols
Dominic Mayers - University of Sherbrooke
Superstring Theory: Past, Present and Future
John Schwarz - California Institute of Technology (Caltech) - Physics Office
PSI 2017/2018 - Statistical Mechanics - Lecture 8
David Kubiznak - Charles University
Wilsonian Renormalization 2: Explicit calculation: Cumulant expansion, RG equations
PSI 2017/2018 - Quantum Field Theory I - Lecture 8
Dan Wohns - Perimeter Institute for Theoretical Physics
Spinors as Representations of the Lorentz Group
Poking holes and cutting corners to achieve Clifford gates with the surface code
Benjamin Brown - University of Sydney
The surface code is currently the leading proposal to achieve fault-tolerant quantum computation. Among its strengths are the plethora of known ways in which fault-tolerant Clifford operations can be performed, namely, by deforming the topology of the surface, by the fusion and splitting of codes…
Order Plus Number ~ Geometry: A Lorentzian Approach to Quantum Gravity
Sumati Surya - Raman Research Institute
I will give an overview of the causal set approach to quantum gravity, and what makes this "fork in the road" distinct from other approaches. Motivated by deep theorems in Lorentzian geometry, causal set theory (CST) posits that the underlying fabric of spacetime is atomistic and encoded in a…
PSI 2017/2018 - Statistical Mechanics - Lecture 7
David Kubiznak - Charles University
Wilsonian Renormalization 1: Basic idea: Integration over Fast Modes, Flowing Couplings
PSI 2017/2018 - Quantum Field Theory I - Lecture 7
Dan Wohns - Perimeter Institute for Theoretical Physics
Beyond Tree Level
The sum-over-paths technique for Clifford circuits
Mark Penney - Scotiabank
The path integral formulation of quantum mechanics has been immensely influential, particularly in high energy physics. However, its applications to quantum circuits has so far been more limited. In this talk I will discuss the sum-over-paths approach to computing transition amplitudes in Clifford…
Boundary Trace Anomalies and Boundary Conformal Field Theory
Christopher Herzog - King's College London
I discuss some aspects of boundary conformal field theories (bCFTs). I will demonstrate that free bCFTs have a universal way of satisfying crossing symmetry constraints. I will introduce a simple class of interacting bCFTs where the interaction is restricted to the boundary. Finally, I will discuss…
Hunting for WIMPs: How low should we go?
Aaron Pierce - University of Michigan–Ann Arbor
Direct detection experiments are rapidly improving their sensitivity to weak scale Dark Matter. A particular interesting (and minimal) possibility is that the Dark matter interacts with ordinary matter via the exchange of weak bosons: the W, Z, and Higgs. Dark matter with substantial coupling to the…
Primordial gravity waves from tidal imprints in large-scale structure
Kiyoshi Masui - Massachusetts Institute of Technology (MIT)
I will describe a tidal effect whereby the decay of primordial gravity waves leaves a permanent shear in the large-scale structure of the Universe. Future large-scale structure surveys - especially radio surveys of high-redshift hydrogen gas - could measure this shear and its spatial dependence to…
PSI 2017/2018 - Statistical Mechanics - Lecture 6
David Kubiznak - Charles University
Spin-Spin Correlation Function, Correlation Length, Continuous Limit, Landau-Ginsburg Functional