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Renormalization and black hole entropy in Loop Quantum Gravity
Ted Jacobson
Microscopic state counting for a black hole in Loop Quantum Gravity yields a result proportional to horizon area, and inversely proportional to Newton's constant and the Immirzi pa…
When is g_{tt} g_{rr} = -1?
Ted Jacobson
The Schwarzschild metric, its Reissner-Nordstrom-de Sitter generalizations to higher dimensions, and some further generalizations all share the feature that g_{tt} g_{rr}=-1 in Sch…
Neutron stars in Einstein-aether theory
Christopher Eling, Ted Jacobson, M. Coleman Miller
As current and future experiments probe strong gravitational regimes around neutron stars and black holes, it is desirable to have theoretically sound alternatives to general relat…
Black hole entanglement entropy regularized in a freely falling frame
Ted Jacobson, Renaud Parentani
We compute the black hole horizon entanglement entropy S_E for a massless scalar field, first with a hard cutoff and then with high frequency dispersion, both imposed in a frame th…
Numerical simulations of gravitational collapse in Einstein-aether theory
David Garfinkle, Christopher Eling, Ted Jacobson
We study gravitational collapse of a spherically symmetric scalar field in Einstein-aether theory (general relativity coupled to a dynamical unit timelike vector field). The initia…
Lorentz violation and perpetual motion
Christopher Eling, Brendan Z. Foster, Ted Jacobson +1
We show that any Lorentz violating theory with two or more propagation speeds is in conflict with the generalized second law of black hole thermodynamics. We do this by identifying…