Abstract
Micellar aqueous solutions of ionic surfactants have been observed to exhibit proton delocalization (the nuclear quantum effect) and to oscillate between a low density (LDL) and a high-density liquid (HDL) state of water at a fixed temperature. It is shown in this paper that such phenomena can be explained with the help of the interpolating Schrӧdinger equation proposed by Ghose. The nuclear quantum effect can be described by the tunneling of a harmonic oscillator in a symmetric double-well potential, and an ensemble of harmonic oscillators can model the LDL-HDL oscillations. The thermodynamics of such harmonic oscillators has been worked out showing continuous transitions between the quantum and classical limits.
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ACKNOWLEDGMENTS
The authors are grateful to Anirban Mukherjee for collaborating to develop the double-well potential section, to Partha Nandi for plotting Figs. 2 and 3, and Alexander Pribylov for his help in preparing the manuscript.
Funding
Study was financially supported by the Ministry of Education and Science of the Russian Federation (2020, no. 0851-2020-0035). For Y.M. the study was carried out as a part of the Strategic Academic Leadership Program “Priority 2030” (Agreement no. 075-15-2021-1213, Russian Federation).
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Y.M. designed and directed the research, and contributed to the interpretation of the results. P.G. carried out applications of the interpolating Schrӧdinger equation and developed the thermodynamics of harmonic oscillators for micellar solutions. The authors made equal contributions to the writing of the article.
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Ghose, P., Mirgorod, Y. Relationship between Classical and Quantum Mechanics in Micellar Aqueous Solutions of Surfactants. Phys. Wave Phen. 32, 34–42 (2024). https://doi.org/10.3103/S1541308X24010072
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DOI: https://doi.org/10.3103/S1541308X24010072