Ermakov-Lewis invariant in Koopman-von Neumann mechanics

Abstract

In the paper Sci. Rep. 8, 8401 (2018), among other things, the Ermakov-Lewis invariant was constructed for the time dependent harmonic oscillator in Koopman-von Neumann mechanics. We point out that there is a simpler method that allows one to find this invariant.

4 pages, svjour3, to be published in Int. J. Theor. Phys

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• Separability and entanglement in classical eigenfunctions as a criterion for Hamiltonian chaos