Microscopic description of multiphonon s
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E.G. Lanza; M.V. AndrΓ©s; F. Catara; Ph. Chomaz; C. Volpe
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Article
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1999
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Elsevier Science
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English
β 267 KB
Starting from a microscopic approach based on RPA, we go beyond it by introducing anharmonicity by taking into account the mixing of two-phonon states among themselves and with one-phonon states. By introducing also non linear terms in the external field we show that these new ingredients give an ex