130 citations · 860 across the 15 of their papers we have counts for
6 papers · 1 filter
Assessing the dynamical assumptions in Tsirelson inequality tests of non-classicality in harmonic oscillators
Arush Garg, Jonathan Halliwell, Taejas Venkataraman
"Macrorealism" posits that a system possesses definite properties at all times and that we can discover these properties, in principle, without disturbing the system's subsequent b…
Exact Phase Space Localized Projectors from Energy Eigenstates
J. J. Halliwell
In investigations of the emergence of classicality from quantum theory, a useful step is the construction of quantum operators corresponding to the classical notion that the system…
Coupling Classical and Quantum Variables using Continuous Quantum Measurement Theory
L. Diosi, J. J. Halliwell
We propose a system of equations to describe the interaction of a quasiclassical variable with a set of quantum variables that goes beyond the usual mean field approximatio…
Effective Theories of Coupled Classical and Quantum Variables from Decoherent Histories: A New Approach to the Backreaction Problem
J. J. Halliwell
We use the decoherent histories approach to quantum theory to derive the form of an effective theory describing the coupling of classical and quantum variables. The derivation is c…
Decoherence of Hydrodynamic Histories: A Simple Spin Model
T. A. Brun, J. J. Halliwell
In the context of the decoherent histories approach to the quantum mechanics of closed systems, Gell-Mann and Hartle have argued that the variables typically characterizing the qua…
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…