We investigate a spinless fermion system on a one dimensional lattice interacting locally with the optical modes of a quantized phonon field: the Holstein model. The system is shown to have a disordered ground state, for small enough coupling, at any density. This is in contrast to the non quantized phonon case, the static Holstein model, which at half filling has an ordered ground state for all couplings
Large deviations in rarefied quantum gases}, Journal of Statistical Physics / Gallavotti, Giovanni; Lebowitz, J; Mastropietro, V.. - In: JOURNAL OF STATISTICAL PHYSICS. - ISSN 0022-4715. - STAMPA. - 108:(2002), pp. 831-861. [10.1023/A:1019766826534]
Large deviations in rarefied quantum gases}, Journal of Statistical Physics
GALLAVOTTI, Giovanni;
2002
Abstract
We investigate a spinless fermion system on a one dimensional lattice interacting locally with the optical modes of a quantized phonon field: the Holstein model. The system is shown to have a disordered ground state, for small enough coupling, at any density. This is in contrast to the non quantized phonon case, the static Holstein model, which at half filling has an ordered ground state for all couplingsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
