A branching-plane momentum rescaling for TAB collapse events, motivated by a Pechukas-force derivation of an effective coupling vector, matches exact quantum populations and avoids unphysical mode excitation.
Electronic Coherences in Molecules: The Projected Nuclear Quantum Momentum as a Hidden Agent
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abstract
Electronic coherences are key to understanding and controlling photo-induced molecular transformations. We identify a crucial quantum-mechanical feature of electron-nuclear correlation, the projected nuclear quantum momenta, essential to capture the correct coherence behavior. In simulations, we show that, unlike traditional trajectory-based schemes, exact-factorization-based methods approximate these correlation terms, and correctly capture electronic coherences in a range of situations, including their spatial dependence, an important aspect that influences subsequent electron dynamics and that is becoming accessible in more experiments.
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physics.chem-ph 1years
2026 1verdicts
CONDITIONAL 1representative citing papers
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Momentum Rescaling for Collapse to a Block Ehrenfest Dynamics
A branching-plane momentum rescaling for TAB collapse events, motivated by a Pechukas-force derivation of an effective coupling vector, matches exact quantum populations and avoids unphysical mode excitation.