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2020 CAP Virtual Sessions / Sessions virtuelle de l'ACP 2020

Jun 7 – 12, 2020
Virtual Platforms
America/Toronto timezone
Welcome to the 2020 CAP Virtual Congress Program website! / Bienvenue au siteweb du programme du Congrès virtuelle de l'ACP 2020!

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Session

R-DTP-1: Theoretical Physics I

R-DTP-1
Jun 11, 2020, 12:00 PM
Virtual Platforms

Virtual Platforms

Conveners

R-DTP-1: Theoretical Physics I

  • Mark Walton (University of Lethbridge)

Presentation materials

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  1. 1. Hot Qubits in Space: Late-time Obstacles to Reliable Predictions with Horizons
    Prof. Cliff Burgess (McMaster U - Perimeter Inst)
    6/11/20, 12:00 PM
    Theoretical Physics / Physique théorique (DTP-DPT)
    Invited Speaker / Conférencier(ère) invité(e)

    Quantum systems in gravitational fields (particularly with horizons) are often plagued by paradoxical predictions at very late times. Examples include predictions for information loss in black holes and for properties of eternal inflation. This talk argues that generic problems exist making such predictions because perturbative methods generically fail at very late times. Similar issues arise...

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  2. 4. The Mass and Luminosity Function of Supermassive Black Holes in the Direct Collapse Scenario
    Prof. Shantanu Basu (University of Western Ontario)
    6/11/20, 12:30 PM
    Theoretical Physics / Physique théorique (DTP-DPT)
    Invited Speaker / Conférencier(ère) invité(e)

    A key challenge to the standard cosmological model is the observation
    of very massive (M > 10^9 Msun) and luminous (L > 10^{13} Lsun)
    quasars already in place by z~7, when the age of the universe was
    just ~800 Myr. The formation of such supermassive black holes (SMBH)
    cannot generally occur in the time available if starting from
    stellar mass black holes. We explore implications of...

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  3. 5. New quasilocal mass and multipole expansion in scalar-tensor gravity
    Prof. Valerio Faraoni
    6/11/20, 12:45 PM
    Theoretical Physics / Physique théorique (DTP-DPT)
    Invited Speaker / Conférencier(ère) invité(e)

    A new generalization of the Hawking-Hayward quasilocal mass to scalar-tensor gravity is compared, for vacum asymptotically flat stationary geometries, with multipole expansion of the gravitational field in this class of theories. The quasilocal mass at spatial infinity coincides with the monopole term, a necessary check lending credibility to this construct.
    [Based on V. Faraoni & J. Côté,...

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