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arXiv · 2209.01439

Quantum and classical branching flow in space and time

Jakub Šťavina·Peter Bokes
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Abstract

Branching flow -- a phenomenon known for steady wave propagation in two-dimensional weak correlated random potential is also present in the time-dependent Schr\"odinger equation for a single particle in one dimension, moving in a fluctuating random potential. We explore the two-dimensional parameter space of this model using numerical simulations and identify its classical regions, where just one classical parameter is sufficient for its specification, and its quantum region, where such a simplification is not possible. We also identify region of the parameter space where known analytical results of a classical white-noise model are relevant. Qualitative behavior of quantum and classical particle dynamics is discussed in terms of branching time scale and a new time scale related to particle's kinetic energy.

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Jakub Šťavina, Peter Bokes. 2022-09-03. Quantum and classical branching flow in space and time. https://doi.org/10.1103/physreva.106.052215

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