Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1)

Revealing the nature of nonequilibrium phase transitions with quantum trajectories

Julkaisun tekijät: Link V, Luoma K, Strunz WT


Julkaisuvuosi: 2019

Journal: Physical Review A

Tietokannassa oleva lehden nimi: PHYSICAL REVIEW A

Lehden akronyymi: PHYS REV A

Volyymi: 99

Julkaisunumero: 6

Sivujen määrä: 7

ISSN: 2469-9926


A damped and driven collective spin system is analyzed by using quantum state diffusion. This approach allows for a mostly analytical treatment of the investigated nonequilibrium quantum many-body dynamics, which features a phase transition in the thermodynamical limit. The exact results obtained in this work, which are free of any finite-size defects, provide a complete understanding of the model. Moreover, the trajectory framework gives an intuitive picture of the two phases occurring, revealing a spontaneously broken symmetry and allowing for a qualitative and quantitative characterization of the phases. We determine exact critical exponents, investigate finite-size scaling, and explain a remarkable nonalgebraic behavior at the transition in terms of torus hopping.

Last updated on 2022-04-03 at 12:40