A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Emergence of anomalous dynamics from the underlying singular continuous spectrum in interacting many-body systems
Tekijät: Settino J, Talarico NW, Cosco F, Plastina F, Maniscalco S, Lo Gullo N
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2020
Journal: Physical Review B
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW B
Lehden akronyymi: PHYS REV B
Artikkelin numero: ARTN 144303
Vuosikerta: 101
Numero: 14
Sivujen määrä: 8
ISSN: 2469-9950
DOI: https://doi.org/10.1103/PhysRevB.101.144303
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/46992934
We investigate the dynamical properties of an interacting many-body system with a nontrivial energy potential landscape that may induce a singular continuous single-particle energy spectrum. Focusing on the Aubry-Andre model, whose anomalous transport properties in the presence of interaction was recently demonstrated experimentally in an ultracold-gas setup, we discuss the anomalous slowing down of the dynamics it exhibits and show that it emerges from the singular-continuous nature of the single-particle excitation spectrum. Our study demonstrates that singular-continuous spectra can be found in interacting systems, unlike previously conjectured by treating the interactions in the mean-field approximation. This, in turns, also highlights the importance of the many-body correlations in giving rise to anomalous dynamics, which, in many-body systems, can result from a nontrivial interplay between geometry and interactions.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
