3 papers
gr-qc1996
Lagrangian perfect fluids and black hole mechanics
Vivek Iyer
The first law of black hole mechanics (in the form derived by Wald), is expressed in terms of integrals over surfaces, at the horizon and spatial infinity, of a stationary, axisymm…
gr-qc1995
A comparison of Noether charge and Euclidean methods for Computing the Entropy of Stationary Black Holes
Vivek Iyer, Robert M. Wald
The entropy of stationary black holes has recently been calculated by a number of different approaches. Here we compare the Noether charge approach (defined for any diffeomorphism…
gr-qc1994
Some Properties of Noether Charge and a Proposal for Dynamical Black Hole Entropy
Vivek Iyer, Robert M. Wald
We consider a general, classical theory of gravity with arbitrary matter fields in dimensions, arising from a diffeomorphism invariant Lagrangian, $\bL$. We first show that $\b…