Fractional Excitations in Cold Atomic Gases
| Autor: | Honer, Jens, Halimeh, Jad C., McCulloch, Ian, Schollwöck, Ulrich, Büchler, Hans Peter |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 86, 051606(R) (2012) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.86.051606 |
| Popis: | We study the behavior of excitations in the tilted one-dimensional Bose-Hubbard model. In the phase with broken symmetry, fundamental excitations are domain-walls which show fractional statistics. Using perturbation theory, we derive an analytic model for the time evolution of these fractional excitations, and demonstrate the existence of a repulsively bound state above a critical center of mass momentum. The validity of the perturbative analysis is confirmed by the use of t- DMRG simulations. These findings open the path for experimental detection of fractional particles in cold atomic gases. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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