Naslov
Relevant coherent states method for the quantum adiabatic dynamics of lattice-coupled charge carriers

Autori
Barišić, Osor-Slaven

Izvornik
Europhysics Letters (0295-5075) 77 (2007), 5; 57004-57009

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quantum lattice; adiabatic polaron; Holstein model

Sažetak
A 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA