6 papers
Locally inertial null normal coordinates
Raf Guedens
Locally inertial coordinates are constructed by carrying Riemann normal coordinates on a codimension two spacelike surface along the geodesics normal to it. Since the normal tangen…
Horizon entropy and higher curvature equations of state
Raf Guedens, Ted Jacobson, Sudipta Sarkar
The Clausius relation between entropy change and heat flux has previously been used to derive Einstein's field equations as an equation of state. In that derivation the entropy is…
Non-equilibrium Thermodynamics of Spacetime
Christopher Eling, Raf Guedens, Ted Jacobson
It has previously been shown that the Einstein equation can be derived from the requirement that the Clausius relation dS = dQ/T hold for all local acceleration horizons through ea…
Primordial black holes in braneworld cosmologies: astrophysical constraints
Dominic Clancy, Raf Guedens, Andrew R Liddle
In two recent papers we explored the modifications to primordial black hole physics when one moves to the simplest braneworld model, Randall--Sundrum type II. Both the evaporation…
Primordial black holes in braneworld cosmologies: Accretion after formation
Raf Guedens, Dominic Clancy, Andrew R Liddle
We recently studied the formation and evaporation of primordial black holes in a simple braneworld cosmology, namely Randall-Sundrum Type II. Here we study the effect of accretion…
Primordial black holes in braneworld cosmologies: Formation, cosmological evolution and evaporation
Raf Guedens, Dominic Clancy, Andrew R Liddle
We consider the population evolution and evaporation of primordial black holes in the simplest braneworld cosmology, Randall-Sundrum type II. We demonstrate that black holes formin…