- Tytuł:
- Spontaneous Currents in a Bosonic Ring
- Autorzy:
-
Makieła, D.
Maśka, M. - Powiązania:
- https://bibliotekanauki.pl/articles/1398603.pdf
- Data publikacji:
- 2016-08
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
03.75.Lm
03.75.Kk
64.60.Ht - Opis:
- Nonequilibrium dynamics of non-interacting bosons in a one-dimensional ring-shaped lattice is studied by means of the kinetic Monte Carlo method. The system is approximated by the classical XY model (the kinetic term is neglected) and then the simulations are performed for the planar classical spins. We study the dynamics that follows a finite-time quench to zero temperature. If the quench is slow enough the system can equilibrate and finally reaches the ground state with uniform spin alignment. However, we show that if the quench is faster than the relaxation rate, the system can get locked in a current-carrying metastable state characterized by a nonzero winding number. We analyze how the zero-temperature state depends on the quench rate.
- Źródło:
-
Acta Physica Polonica A; 2016, 130, 2; 569-572
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł