| Autor: |
Klich, I., Lannert, C., Refael, G. |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 99, 205303 (2007) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.99.205303 |
| Popis: |
We study the survival of super-currents in a system of impenetrable bosons subject to a quantum quench from its critical superfluid phase to an insulating phase. We show that the evolution of the current when the quench follows a Rosen-Zener profile is exactly solvable. This allows us to analyze a quench of arbitrary rate, from a sudden destruction of the superfluid to a slow opening of a gap. The decay and oscillations of the current are analytically derived, and studied numerically along with the momentum distribution after the quench. In the case of small supercurrent boosts $\nu$, we find that the current surviving at long times is proportional to $\nu^3$. |
| Databáze: |
arXiv |
| Externí odkaz: |
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