Abstract
In Chenaghlou and Faizy (Int. J. Theor. Phys. 2008), the authors claim that they have constructed the Barut-Girardello coherent states for the parabolic cylinder functions. However, we point out here that by introducing these coherent states, Schrödinger was able to put forth the idea of “coherent states of the quantum harmonic oscillator” over eighty years ago. These coherent states are derived not only from the Barut-Girardello eigenvalue equation, but also from the Schrödinger and the Klauder-Perelomov approaches. Thus, contrary to their claim, the authors have not introduced new coherent states. In particular, a wide range of the parabolic cylinder functions do not form an orthonormal basis.
References
Chenaghlou, A., Faizy, O.: Int. J. Theor. Phys. (2008). doi:10.1007/s10773-008-9696-z
Schrödinger, E.: Ann. Phys. 79(4), 361 (1926)
Barut, A.O., Girardello, L.: Commun. Math. Phys. 21(1), 41 (1971)
Perelomov, A.: Generalized Coherent States and Their Applications. Springer, New York (1986)
Howard, S., Roy, S.K.: Am. J. Phys. 55(12), 1109 (1987)
Borzov, V.V., Damaskinsky, E.V.: J. Math. Sci. 125(2), 123 (2005)
Abramowitz, M., Stegun, I.A.: Handbook of Mathematical Functions: with Formulas, Graphs, and Mathematical Tables. Dover, New York (1972)
Gradshteyn, I.S., Ryzhik, I.M.: Table of Integrals, Series, and Products. Academic Press, San Diego (2000)
Haskell, T.G., Wybourne, B.G.: Proc. R. Soc. Lond. A 334, 541 (1973)
Sakurai, J.J.: Modern Quantum Mechanics. Addison-Wesley, Reading (1994)
Griffiths, J.D.: Introduction to Quantum Mechanics. Prentice Hall, New York (2004)
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Fakhri, H., Dehghani, A. & Mojaveri, B. Comments on “Barut-Girardello Coherent States for the Parabolic Cylinder Functions”. Int J Theor Phys 48, 369–372 (2009). https://doi.org/10.1007/s10773-008-9809-8
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DOI: https://doi.org/10.1007/s10773-008-9809-8