676 citations · 676 across the 1 of their papers we have counts for
5 papers
A General Definition of "Conserved Quantities" in General Relativity and Other Theories of Gravity
Robert M. Wald, Andreas Zoupas
In general relativity, the notion of mass and other conserved quantities at spatial infinity can be defined in a natural way via the Hamiltonian framework: Each conserved quantity…
Non-Equilibrium Quantum Electrodynamics
C. Anastopoulos, A. Zoupas
We employ the influence functional technique to trace out the photonic contribution from full quantum electrodynamics. The reduced density matrix propagator for the spinor field is…
The Post-Decoherence Density Matrix Propagator for Quantum Brownian Motion
Jonathan Halliwell, Andreas Zoupas
Using the path integral representation of the density matrix propagator of quantum Brownian motion, we derive its asymptotic form for times greater than the localization time, $ (\…
Phase Space Localization and Approach to Thermal Equilibrium for a Class of Open Systems
Andreas Zoupas
We analyse the evolution of a quantum oscillator in a finite temperature environment using the quantum state diffusion (QSD) picture. Following a treatment similar to that of refer…
Quantum State Diffusion, Density Matrix Diagonalization and Decoherent Histories: A Model
Jonathan Halliwell, Andreas Zoupas
We analyse the quantum evolution of a particle moving in a potential in interaction with an environment of harmonic oscillators in a thermal state, using the quantum state diffusio…