A soft mode in a finite Fermi-system: anharmonic effects near the instability point

Details A soft mode in a finite Fermi-system: anharmonic effects near the instability point A soft mode in a finite Fermi-system: anharmonic effects near the instability point

2001-12-04

arxiv.org/abs/nucl-th/0112013v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, 2 figures

Scientific paper

We consider a finite Fermi-system where the residual interactions create a
soft mode of the excitation spectrum. Because of the large vibrational
amplitude, the standard random phase approximation does not work in this
situation. We develop a regular method for constructing the anharmonic
potential and illustrate the application of the formalism by a simple model.

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