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quant-ph2026
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…
quant-ph2026
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…