Joint Distributions and Quantum Nonlocal Models

A standard result in quantum mechanics is this: if two observables are commuting then they have a classical joint distribution in every state.A converse is demonstrated here: If a Metal Wallet Card classical joint distribution for the pair agrees with standard quantum facts, then the observables must commute.This has consequences for some historica

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A piecewise heat equation with constant and variable order coefficients: A new approach to capture crossover behaviors in heat diffusion

While the equation depicting the heat flow within homogeneous has been applied in several fields with some success, it has also faced several difficulties to depict heat diffusion in some non-homogeneous media.For particular behaviours adequate differential operators have been applied, for instance, a long-range behaviour has been depicted using op

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