Speaker
Jeet Shannigrahi
(University of British Columbia, Vancouver)
Description
We generalize the Momentum Average (MA) approximation to compute the finite temperature spectral functions of the Holstein polaron in an one-dimensional system. We validate our MA results in 1D against available numerical data from the density matrix renormalization group (DMRG) method and the finite-temperature Lanczos method, establishing the accuracy of the MA results which are obtained at a substantially lower computational cost. We use MA to to characterize the temperature range over which a coherent quasiparticle (the polaron) exists and we study the evolution with temperature of its effective mass and lifetime.
| Keyword-1 | holstein polarons |
|---|---|
| Keyword-2 | thermal phonons |
| Keyword-3 | momentum average |
Authors
Jeet Shannigrahi
(University of British Columbia, Vancouver)
Mona Berciu
(University of British Columbia)
