62 citations · 106 across the 9 of their papers we have counts for
4 papers · 1 filter
Time and causality in quantum gravity
Charis Anastopoulos
The problem of time in quantum gravity is often presented as a consequence of applying quantum theory to general relativity. These notes adopt a broader perspective. We first exami…
Singular Solutions of the Tolman Oppenheimer Volkoff Equation with a Cosmological Constant Classification and Properties
Christos Dounis, Charis Anastopoulos
We study the Tolman-Oppenheimer-Volkoff equation in the presence of a cosmological constant for general thermodynamically consistent equations of state, without imposing regularity…
Including gravity in equilibrium thermodynamics
Eirini Sourtzinou, Charis Anastopoulos
This paper is part of a bottom-up approach to gravitational thermodynamics that is guided by the axiomatic frameworks of equilibrium thermodynamics. We identify a novel form of the…
Quantum Fields in Nonstatic background: A Histories Perspective
C. Anastopoulos
For a quantum field living on a non - static spacetime no instantaneous Hamiltonian is definable, for this generically necessitates a choice of inequivalent representation of the c…