257 citations · 281 across the 4 of their papers we have counts for
7 papers
Noether Currents of Charged Spherical Black Holes
Michael C. Ashworth Sean A. Hayward
We calculate the Noether currents and charges for Einstein-Maxwell theory using a version of the Wald approach. In spherical symmetry, the choice of time can be taken as the Kodama…
Boundary Terms and Noether Current of Sphereical Black Holes
Michael C. Ashworth, Sean A. Hayward
We consider two proposals for defining black hole entropy in spherical symmetry, where the horizon is defined locally as a trapping horizon. The first case, boundary terms in a dua…
Dynamic black-hole entropy
Sean A. Hayward, Shinji Mukohyama, M. C. Ashworth
We consider two non-statistical definitions of entropy for dynamic (non-stationary) black holes in spherical symmetry. The first is analogous to the original Clausius definition of…
Coherent State Approach to Quantum Clocks
M. C. Ashworth
The ``problem of time'' has been a pressing issue in quantum gravity for some time. To help understand this problem, Rovelli proposed a model of a two harmonic oscillators system w…
Coherent State Approach to Time Reparameterization Invariant Systems
M. C. Ashworth
For many years coherent states have been a useful tool for understanding fundamental questions in quantum mechanics. Recently, there has been work on developing a consistent way of…
Constrainted Coherent States
M. C. Ashworth
Coherent states possess a regularized path integral and gives a natural relation between classical variables and quantum operators. Recent work by Klauder and Whiting has included…