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000057567 084__ $$2WoS$$aPhysics, Multidisciplinary
000057567 1001_ $$0P:(DE-HGF)0$$ade Filippis, G.$$b0
000057567 245__ $$aValidity of the Franck-Condon principle in the optical spectroscopy: optical conductivity of the Fröhlich polaron
000057567 260__ $$aCollege Park, Md.$$bAPS$$c2006
000057567 300__ $$a136405
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000057567 440_0 $$04925$$aPhysical Review Letters$$v96$$x0031-9007
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000057567 520__ $$aThe optical absorption of the Frohlich polaron model is obtained by an approximation-free diagrammatic Monte Carlo method and compared with two new approximate approaches that treat lattice relaxation effects in different ways. We show that: (i) a strong coupling expansion, based on the Franck-Condon principle, well describes the optical conductivity for large coupling strengths (alpha > 10); (ii) a memory function formalism with phonon broadened levels reproduces the optical response for weak coupling strengths (alpha < 6) taking the dynamic lattice relaxation into account. In the coupling regime 6 <alpha < 10, the optical conductivity is a rapidly changing superposition of both Franck-Condon and dynamic contributions.
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000057567 7001_ $$0P:(DE-HGF)0$$aCataudella, V.$$b1
000057567 7001_ $$0P:(DE-HGF)0$$aMishchenko, A. S.$$b2
000057567 7001_ $$0P:(DE-Juel1)VDB54416$$aPerroni, C. A.$$b3$$uFZJ
000057567 7001_ $$0P:(DE-HGF)0$$aDevreese, J. T.$$b4
000057567 773__ $$0PERI:(DE-600)1472655-5$$a10.1103/PhysRevLett.96.136405$$gVol. 96, p. 136405$$p136405$$q96<136405$$tPhysical review letters$$v96$$x0031-9007$$y2006
000057567 8567_ $$uhttp://dx.doi.org/10.1103/PhysRevLett.96.136405
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