Variational path-integral treatment of a translation invariant many-polaron system
arXiv:cond-mat/0601548 · doi:10.1103/PhysRevB.71.214301
Abstract
A translation invariant N-polaron system is investigated at arbitrary electron-phonon coupling strength, using a variational principle for path integrals for identical particles. An upper bound for the ground state energy is found as a function of the number of spin up and spin down polarons, taking the electron-electron interaction and the Fermi statistics into account. The resulting addition energies and the criteria for multipolaron formation are discussed.
22 pages, 5 figures, 1 table, E-mail addresses: [email protected], [email protected], [email protected]