Naslov
Reduced-basis approach to many-body localization

Autori
Prelovšek, Peter ; Barišić, Osor-Slaven ; Mierzejewski, Marcin

Izvornik
Physical review. B (2469-9950) 97 (2018), 3; 035104, 11

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

Ključne riječi
many-body localization ; Anderson ; MBL ; fermions ; interacting ; reduced basis

Sažetak
Within the standard model of many-body localization, i.e., the disordered chain of spinless fermions, we investigate how the interaction affects the many-body states in the basis of noninteracting localized Anderson states. From this starting point we follow the approach that uses a reduced basis of many-body states. Together with an extrapolation to the full basis, it proves to be efficient for the evaluation of the stiffnesses of local observables, which remain finite within the non-ergodic regime and represent the hallmark of the many-body localization (MBL). The method enables a larger span of system sizes and, within the MBL regime, allows for a more careful analysis of the size scaling of calculated quantities. On the other hand, the survival stiffness as the representative of non--local quantities, reveals limitations of the reduced-basis approach.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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