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Springer eBooks

Classical Solutions of Schroedinger Equations and Nonstandard Analysis

Tsunehiro Kobayashi

Published Jan 1, 1994• 0 citations
Publisher
DOI
10.1007/978-1-4615-2956-9_26

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Comment on "Semiclassical and Quantum Analysis of a Focussing Free Particle Hermite Wavefunction", by Paul Strange (arXiv:1309.6753 [quant-ph])

Andrea Aiello

In the recent and very enjoyable paper (Paul Strange, "Semiclassical and Quantum Analysis of a Focussing Free Particle Hermite Wavefunction", arXiv:1309.6753[quant-ph]), Professor Strange has studied a particular solution of the free particle Schroedinger equation in which the time and space dependence are not separable. After recognizing the fact that "The Schroedinger equation has an identical mathematical form to the paraxial wave equation [...]", he claims to "describe and try to gain insight into an exotic, apparently accelerating solution of the free particle Schroedinger equation that is square integrable and which also displays some unusual characteristics." It is the main aim of this short note to show that the wavefunction described by Prof. Strange is simply one particular Hermite-Gauss solution of the paraxial wave equation and even more "exotic" examples can be found by considering, e.g., Laguerre-Gauss solutions.

arXiv:1309.7899•Sep 30, 2013•2 citations
In the recent and very enjoyable paper (Paul Strange, "Semiclassical and Quantum Analysis of a Focussing Free Particle Hermite Wavefunction", arXiv:1309.6753[quant-ph]), Professor Strange has studied a particular solution of the free particle Schroedinger equation in which the time and space dependence are not separable. After recognizing the fact that "The Schroedinger equation has an identical mathematical form to the paraxial wave equation [...]", he claims to "describe and try to gain insight into an exotic, apparently accelerating solution of the free particle Schroedinger equation that is square integrable and which also displays some unusual characteristics." It is the main aim of this short note to show that the wavefunction described by Prof. Strange is simply one particular Hermite-Gauss solution of the paraxial wave equation and even more "exotic" examples can be found by considering, e.g., Laguerre-Gauss solutions.