O. S. Barišić 2007 EPL 77 57004 doi:10.1209/0295-5075/77/57004
O. S. Barišić
Show affiliationsA new numerical method is proposed for determining the low-frequency dynamics of the charge carrier coupled to the deformable quantum lattice. As an example, the polaron band structure is calculated for the one-dimensional Holstein model. The adiabatic limit on the lattice, which cannot be reached by other approaches, is investigated. In particular, an accurate description is obtained of the crossover between quantum small adiabatic polarons, pinned by the lattice, and large adiabatic polarons, moving along the continuum as classical particles. It is shown how the adiabatic contributions to the polaron dispersion, involving spatial correlations over multiple lattice sites, can be treated easily in terms of coherent states.
Issue 5 (March 2007)
Received 12 September 2006, in final form 9 January 2007
Published 20 February 2007
O. S. Barišić 2007 EPL 77 57004
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