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Talk given to the MIAPP workshop Dark Energy 2 on Nov 16, 2021
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Influence Through Mixing: Hotspots as Cartoons of Quantum Black Holes. Seminar given to the Copernicus international online seminar series.
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This is a short personal overview of some topics in inflationary cosmology. Unfortunately the video froze during the first few slides, but it stops doing so not too far in. (Apologies for this.)
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EFTS, Gravity and Clues from the UV: Theory Group Seminar for Imperial College April 2021
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Physics 4Q03 Tutorial Weds April 14: This is the final tutorial spent taking up part of the midterm and answering questions. Good luck with your exams!
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Physics 4Q03 Lecture 28: This lecture applies the framework of relativistic quantum fields to the simplest case of a spinless particle and constructs the Klein Gordon hamiltonian and some of its…
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Physics 4Q03 Lecture 27: This lecture describes the logic that determines which fields can be used to represent particles of different spins, and describes the requirement of microcausality and why…
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Physics 4Q03 Lecture 26: This lecture works through how Poincare generators (4-momentum and the angular momentum tensor) transform in quantum relativity. A sketch is given of the argument for the…
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Physics 4Q03 Lecture 25: This lecture finishes the general review of special relativity in terms of 4-vectors and reviews the treatment of symmetry in quantum mechanics.
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Physics 4Q03 Lecture 24: This lecture summarizes some aspects of special relativity, including its formulation in terms of the Lorentz group.
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Physics 4Q03 Lecture 23: This lecture starts with a summary of renormalization for Casimir energy in a waveguide, and closes with the start of a summary of Special Relativity.
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Physics 4Q03 Lecture 22: This lecture recaps the previous ones and completes the interactions of a nonrelativistic charged particle to include the Coulomb interaction.
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Physics 4Q03 Lecture 21: This lecture describes how the electromagnetic vector potential (ie photons) couple to nonrelativistic charged particles, constructing the interactions by `gauging' the…
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Physics 4Q03 Lecture 20: This lecture describes how to construct interactions between electromagnetic fields and the Schrodinger fields that describe slowly moving particles. The interactions…
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Physics 4Q03 Lecture 19: This lecture evaluates the Casimir energy for the vacuum fluctuations of a field between two plates on which the field vanishes, showing that it is UV finite. Along the way…
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Physics 4Q03 Lecture 18: This lecture continues the previous one on photons in electromagnetism, and provides a sermon about UV and IR divergences and why you can use any regularization you like to…
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Physics 4Q03 Lecture 17: This lecture continues the discussion of quantizing the electromagnetic fields and shows how field energy and momentum can be written in terms of photon creation and…
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Physics 4Q03 Lecture 16: This lecture provides a whirlwind review of Maxwell's equations and their solutions in terms of electromagnetic waves. This allows an introduction to gauge invariance…
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Physics 4Q03 Lecture 15: This lecture describes the leading corrections to the classical BEC, using a Bogoliubov transformation to identify the spectrum of quasiparticle fluctuations about the…
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Physics 4Q03 Lecture 14: This lecture continues the discussion of Bose Einstein condensation and shows how a semiclassical analysis can allow a calculation of the optimal density of condensed…
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Physics 4Q03 Lecture 12: This lecture summarizes the position space formalism of the previous lecture and introduces simple self-interactions.
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Physics 4Q03 Lecture 13: This lecture reviews how to set up averages with statistical mechanics, translating the grand canonical ensemble into the language of occupation number. This is used to…
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Physics 4Q03 Tutorial Feb 22, 2021
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Physics 4Q03 Tutorial Feb 11, 2021
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