Restoration of broken symmetries in Self-Consistent RPA

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It is shown that the Self-Consistent RPA (SCRPA) approach allows in a very natural way to restore symmetries, spontaneously broken on the mean field level. This is achieved via the introduction of a second Lagrange multiplier which constrains the variance of the symmetry operator to zero. This important feature of SCRPA, here pointed out for the first time, is illustrated employing a simplified model of the nuclear superfluidity.
6 pages, submitted to Phys. Rev. C

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Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/81672

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nucl-th/0106064
 http://arxiv.org/abs/nucl-th/0106064

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arXiv