Observation of Quantum Equilibration in Dilute Bose Gases
| Autor: | Niu, Linxiao, Tang, Pengju, Yang, Baoguo, Chen, Xuzong, Wu, Biao, Zhou, Xiaoji |
|---|---|
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 94, 063603 (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.94.063603 |
| Popis: | We investigate experimentally the dynamical relaxation of a non-integrable quantum many-body system to its equilibrium state. A Bose-Einstein condensate is loaded into the first excited band of an optical lattice and let to evolve up to a few hundreds of milliseconds. Signs of quantum equilibration are observed. There is a period of time, roughly 40 ms long, during which both the aspect ratio of the cloud and its momentum distribution remain constant. In particular, the momentum distribution has a flat top and is not a Gaussian thermal distribution. After this period, the cloud becomes classical as its momentum distribution becomes Gaussian. Comment: 6 pages, 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|