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quant-ph2025
The threshold for quantum-classical correspondence is
Felipe Hernández, Daniel Ranard, C. Jess Riedel
In chaotic quantum systems, an initially localized quantum state can deviate strongly from the corresponding classical phase-space distribution after the Ehrenfest time $t_{\mathrm…
math-ph2025
Classical correspondence beyond the Ehrenfest time for open quantum systems with general Lindbladians
Felipe Hernández, Daniel Ranard, C. Jess Riedel
Quantum and classical systems evolving under the same formal Hamiltonian may dramatically differ after the Ehrenfest timescale , even as $\hbar \to 0…
quant-ph2025
Ehrenfest's theorem beyond the Ehrenfest time
Felipe Hernández, Daniel Ranard, C. Jess Riedel
In closed quantum systems, wavepackets can spread exponentially in time due to chaos, forming long-range superpositions in just seconds for ordinary macroscopic systems. A weakly c…