26 citations · 51 across the 7 of their papers we have counts for
7 papers
The Quantum Plumber's Problem
Nicolas G. Underwood, Holger F. Hofmann, Jonte R. Hance
Recent work quantified the notion of quantum counterfactual gain for an extended Elitzur-Vaidman bomb test style scenario, through a connection to the negativity of the Kirkwood-Di…
Convex conservation of von Neumann entropy implies unitarity or antiunitarity
Nicolas G. Underwood, Jonte R. Hance
On the space of density matrices , Kadison's theorem establishes that all invertible convex transformations are unitarity or antiunitary. For a finite Hilber…
A principle of information conservation for physical laws (Hidden information in quantum systems?)
Nicolas Underwood
A principle of information conservation is shown in abstract terms to rule out probabilistic physical laws, necessitating the existence of state trajectories. It furthermore provid…
Signatures of relic quantum nonequilibrium
Nicolas G. Underwood
[Shortened Abstract:] This thesis explores the possibility that quantum probabilities arose thermodynamically. A chief concern is the detection of primordial `quantum nonequilibriu…
Extreme quantum nonequilibrium, nodes, vorticity, drift, and relaxation retarding states
Nicolas G. Underwood
Consideration is given to the behaviour of de Broglie trajectories that are separated from the bulk of the Born distribution with a view to describing the quantum relaxation proper…
Anomalous spectral lines and relic quantum nonequilibrium
Nicolas G. Underwood, Antony Valentini
We describe features that could be observed in the line spectra of relic cosmological particles should quantum nonequilibrium be preserved in their statistics. According to our arg…
Quantum field theory of relic nonequilibrium systems
Nicolas G. Underwood, Antony Valentini
In terms of the de Broglie-Bohm pilot-wave formulation of quantum theory, we develop field-theoretical models of quantum nonequilibrium systems which could exist today as relics fr…