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2022 CAP Congress / Congrès de l'ACP 2022

5–11 Jun 2022
McMaster University
America/Toronto timezone
Welcome to the 2022 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2022!

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Session

W3-2 Frontiers in Theoretical Physics I (DTP) | Frontières en physique théorique I (DPT)

W3-2
8 Jun 2022, 15:15
McMaster University

McMaster University

Conveners

W3-2 Frontiers in Theoretical Physics I (DTP) | Frontières en physique théorique I (DPT)

  • Robert Spekkens (Perimeter Institute for Theoretical Physics)

Presentation materials

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  1. 3001. (I) Causality and modifications to Einstein's gravity
    Simon Caron-Huot (McGill University)
    08/06/2022, 15:15
    Theoretical Physics / Physique théorique (DTP-DPT)
    Invited Speaker / Conférencier(ère) invité(e)

    Does our world respect causality at all energy scales? We explore constraints on gravitational dynamics which stem from this assumption. Parameterizing long-distance effects of possible new heavy particles using effective field theory (EFT), we study causality of 2 to 2 scattering processes. Due to its energy growth, the gravitational force turns out to be particularly difficult to modify....

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  2. 3359. (G*) Quantum Corrections to Hawking Radiation
    Mathew Schneider (McMaster University)
    08/06/2022, 15:45
    Theoretical Physics / Physique théorique (DTP-DPT)
    Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

    Dr. Stephen Hawking’s derivation of the eponymous Hawking radiation marked a significant step forward in the ongoing explorations into quantum theories of gravity. However, despite the significance of this work, higher order quantum corrections to the energy flux have not been calculated in most part due to the difficulty of such QFT calculations in curved space. To avoid this, we make use of...

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  3. 3529. Gravitational time dilation, free fall, and matter waves
    Andrzej Czarnecki
    08/06/2022, 16:00
    Theoretical Physics / Physique théorique (DTP-DPT)
    Oral (Non-Student) / Orale (non-étudiant(e))

    I demonstrate that a de Broglie wave of a particle in a gravitational field turns towards the region of a smaller gravitational potential, causing the particle to fall. This turning is caused by clocks running slower in the smaller potential. I use the analogy of ocean waves that are slower in shallower water and turn towards beaches. This approach explains the free fall qualitatively and...

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  4. 3313. WITHDRAWN - (G) Astrophysical foreground cleanup using non-local means
    Mr Guillermo F. Quispe Peña (Simon Fraser University)
    Theoretical Physics / Physique théorique (DTP-DPT)
    Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

    To create high-fidelity Cosmic Microwave Background (CMB) maps, current component separation methods rely on availability of information on different foreground components, usually through multi-band frequency coverage of the instrument. Internal linear combination (ILC) methods provide an unbiased estimators for CMB which are easy to implement, but component separation quality crucially...

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