Naslov
Universal dynamics of a soliton after an interaction quench

Autori
Franchini, Fabio ; Gromov, Andrey ; Kulkarni, Manas ; Trombettoni, Andrea

Izvornik
Journal of physics. A, Mathematical and theoretical (1751-8113) 48 (2015), 28; 28FT01, 11

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

Ključne riječi
Quench, Hydrodynamics, Soliton

Sažetak
We propose a new type of experimentally feasible quantum quench protocol in which a quantum system is prepared in a coherent, localized excited state of a Hamiltonian. During the evolution of this solitonic excitation, the microscopic interaction is suddenly changed. We study the dynamics of solitons after this interaction quench for a wide class of systems using a hydrodynamic approach. We find that the post- quench dynamics is universal at short times, i.e. it does not depend on the microscopic details of the physical system. Numerical support for these results is presented using generalized non-linear Schroedinger equation, relevant for the implementation of the proposed protocol with ultracold bosons, as well as for the integrable Calogero model in harmonic potential. Finally, it is shown that the effects of integrability breaking by a parabolic potential and by a power- law non-linearity do not change the universality of the short-time dynamics.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA