Jul 20 – 24, 2015
Frankfurt Institute for Advanced Studies
Europe/Berlin timezone

Super-Entropic Black Holes

Jul 23, 2015, 12:00 PM
1h
Frankfurt Institute for Advanced Studies

Frankfurt Institute for Advanced Studies

Goethe-Universität FrankfurtCampus Riedberg Ruth-Moufang-Straße 1 60438 Frankfurt am Main GERMANY

Speaker

Robert Mann (University of Waterloo)

Description

Black Hole Chemistry is a new perspective on black hole thermodynamics, one that indicates that once vacuum energy is taken into account, black holes behave more like chemical systems. As a consequence mass becomes chemical enthalpy, the notion of a thermodynamic volume appears, and black holes exhibit a broad range of chemical phenomena, including liquid/gas phase transitions similar to a Van der Waals fluid, triple points similar to that of water, and re-entrant phase transitions that appear in gels. One conjecture to follow from this program is that the entropy of an AdS black hole is bounded above by a function of its thermodynamic volume via a relation known as the Reverse Isoperimetric Inequality. Here I construct a new new class of rotating AdS black holes that provide counterexamples to this conjecture. They are formed by taking a new ultraspinning limit to the Kerr-AdS class of black holes, yielding objects whose event horizons are non-compact but have finite area. The structure of the spacetime is qualitatively changed since it is no longer possible to return to a frame that does not rotate at infinity. I shall present both the construction of these “super-entropic” black holes and their implications for black hole thermodynamics.

Primary author

Robert Mann (University of Waterloo)

Presentation materials