### Conveners

#### W1-4 Gravity I (DTP) / Gravité I (DPT)

- Ingrid Stairs (UBC)

David Kubiznak
(Perimeter Institute)

6/17/15, 8:45 AM

Theoretical Physics / Physique théorique (DTP-DPT)

Invited Speaker / Conférencier invité

The mass of a black hole has traditionally been identified with its energy. We describe a
new perspective on black hole thermodynamics, one that identifies the mass of a black hole
with chemical enthalpy, and the cosmological constant as thermodynamic pressure. This leads
to an understanding of black holes from the viewpoint of chemistry, in terms of concepts such as Van der Waals fluids,...

Prof.
Ariel Edery
(Bishop's)

6/17/15, 9:15 AM

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Non-Student) / orale (non-étudiant)

We discuss the physics of *restricted Weyl invariance*, a symmetry of dimensionless actions in four dimensional curved space time. When we study a scalar field nonminimally coupled to gravity with Weyl(conformal) weight of $-1$ (i.e. scalar field with the usual two-derivative kinetic term), we find that dimensionless terms are either fully Weyl invariant or are Weyl invariant if the conformal...

Prof.
Réjean Plamondon
(École Polytechnique de Montréal)

6/17/15, 9:30 AM

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Non-Student) / orale (non-étudiant)

In a recent paper [1] on the modeling of emergent trends in complex biological and physical systems, an overview of the Bayesian approach [2] that we have used to describe the space-time curvature of a static spherically symmetric massive system was presented. The first part of this conference summarizes the main steps of this development. Reinterpreting Einstein gravitation equation in the...

Bradley Cownden
(University of Manitoba)

6/17/15, 9:45 AM

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition)

We consider linear perturbations of the background type IIB SUGRA solutions and find the equations of motion for the moduli. In particular, we allow for spacetime fluctuations of the positions of the D3-branes in the compact dimensions. We postulate an ansatz for the 5-form flux due to the motion of the D3-branes, and a corresponding first-order part of the metric. The movement of the...

Dr
Prayush Kumar
(Canadian Institute for Theoretical Astrophysics)

6/17/15, 10:00 AM

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Non-Student) / orale (non-étudiant)

The direct detection of gravitational waves is imminent with the network of Advanced LIGO, Virgo, Geo, KAGRA detectors coming online. Coalescing binaries of stellar-mass black holes are one of the flagship sources for these terrestrial detectors. Planned detection searches that will be performed over the instrument data rely on models of inspiraling compact binaries. In this talk I would...