Universal dynamics on the way to thermalization
It is demonstrated how a many-body system far from thermal equilibrium can exhibit universal dynamics in passing a nonthermal fixed point. As an example, the process of Bose-Einstein (BE) condensation of a dilute cold gas is considered. If the particle flux into the low-energy modes, induced, for ex...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
30 September 2014
|
| In: |
New journal of physics
Year: 2014, Jahrgang: 16, Heft: 9 |
| ISSN: | 1367-2630 |
| DOI: | 10.1088/1367-2630/16/9/093052 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1367-2630/16/9/093052
|
| Verfasserangaben: | Boris Nowak, Jan Schole and Thomas Gasenzer |
| Zusammenfassung: | It is demonstrated how a many-body system far from thermal equilibrium can exhibit universal dynamics in passing a nonthermal fixed point. As an example, the process of Bose-Einstein (BE) condensation of a dilute cold gas is considered. If the particle flux into the low-energy modes, induced, for example by a cooling quench, is sufficiently strong, the Bose gas develops a characteristic power-law single-particle spectrum , and critical slowing down in time occurs. The fixed point is shown to be marked by the creation and dilution of tangled vortex lines. Alternatively, for a weak cooling quench and particle flux, the condensation process runs quasi-adiabatically, passing by the fixed point in the far distance, and the signatures of critical scaling remain absent. |
|---|---|
| Beschreibung: | Gesehen am 07.08.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1367-2630 |
| DOI: | 10.1088/1367-2630/16/9/093052 |