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Comment on "Ehrenfest times for classically chaotic systems"
2003
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
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In a recent Phys. Rev. E Rapid Communication, the authors, Silvestrov and Beenakker, introduce a way to lengthen the Ehrenfest time, τ, for fully chaotic systems. We disagree with several statements made in their paper, and address the following points essential to their conclusions: 1) it is not true that all semiclassical approximations for chaotic systems fail at a so-called 'logtime', τ∝ - (ħ), differing only by a numerical coefficient; and 2) the limitation of the semiclassical
doi:10.1103/physreve.68.038201
pmid:14524936
fatcat:cqbgvn442ncdzkg47o6re55yzi