Variational approach to dequantization

Details Variational approach to dequantization Variational approach to dequantization

2005-11-08

arxiv.org/abs/quant-ph/0511068v2

J. Phys. A 39, L229-L235 (2006)

Physics

Quantum Physics

6 pages, 1 figure. v2: changes in presentation and content

Scientific paper

10.1088/0305-4470/39/14/L03

We present a dequantization procedure based on a variational approach whereby quantum fluctuations latent in the quantum momentum are suppressed. This is done by adding generic local deformations to the quantum momentum operator which give rise to a deformed kinetic term quantifying the amount of ``fuzzyness'' caused by such fluctuations. Considered as a functional of such deformations, the deformed kinetic term is shown to possess a unique minimum which is seen to be the classical kinetic energy. Furthermore, we show that extremization of the associated deformed action functional introduces an essential nonlinearity to the resulting field equations which are seen to be the classical Hamilton-Jacobi and continuity equations. Thus, a variational procedure determines the particular deformation that has the effect of suppressing the quantum fluctuations, resulting in dequantization of the system.

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