Non-equilibrium coherence dynamics in one-dimensional Bose gases
| dc.creator | Hofferberth, S. | |
| dc.creator | Lesanovsky, I. | |
| dc.creator | Fischer, B. | |
| dc.creator | Schumm, T. | |
| dc.creator | Schmiedmayer, J. | |
| dc.date | 2007-06-15 | |
| dc.date | 2007-08-02 | |
| dc.date.accessioned | 2026-07-07T09:20:21Z | |
| dc.date.available | 2026-07-07T09:20:21Z | |
| dc.description | Low-dimensional systems are beautiful examples of many-body quantum physics. For one-dimensional systems the Luttinger liquid approach provides insight into universal properties. Much is known of the equilibrium state, both in the weakly and strongly interacting regime. However, it remains a challenge to probe the dynamics by which this equilibrium state is reached. Here we present a direct experimental study of the coherence dynamics in both isolated and coupled degenerate 1d Bose gases. Dynamic splitting is used to create two 1d systems in a phase coherent state. The time evolution of the coherence is revealed in local phase shifts of the subsequently observed interference patterns. Completely isolated 1d Bose gases are observed to exhibit a universal sub-exponential coherence decay in excellent agreement with recent predictions by Burkov et al. [Phys. Rev. Lett. 98, 200404 (2007)]. For two coupled 1d Bose gases the coherence factor is observed to approach a non-zero equilibrium value as predicted by a Bogoliubov approach. This coupled-system decay to finite coherence is the matter wave equivalent of phase locking two lasers by injection. The non-equilibrium dynamics of superfluids plays an important role in a wide range of physical systems, such as superconductors, quantum-Hall systems, superfluid Helium, and spin systems. Our experiments studying coherence dynamics show that 1d Bose gases are ideally suited for investigating this class of phenomena. | |
| dc.description | to appear in nature | |
| dc.identifier | https://arxiv.org/abs/0706.2259 | |
| dc.identifier | http://arxiv.org/abs/0706.2259 | |
| dc.identifier | Nature 449, 324-327 (20 September 2007) | |
| dc.identifier | doi:10.1038/nature06149 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/154696 | |
| dc.subject | Other Condensed Matter | |
| dc.subject | Superconductivity | |
| dc.title | Non-equilibrium coherence dynamics in one-dimensional Bose gases | |
| dc.type | text |