Nonlinear phase-dynamics in a driven Bosonic Josephson junction
| Autor: | Boukobza, Erez, Moore, Michael G., Cohen, Doron, Vardi, Amichay |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 104, 240402 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.104.240402 |
| Popis: | We study the collective dynamics of a driven two mode Bose-Hubbard model in the Josephson interaction regime. The classical phase-space is mixed, with chaotic and regular components, that determine the dynamical nature of the fringe-visibility. For weak off-resonant drive, where the chaotic component is small, the many-body dynamics corresponds to that of a Kapitza pendulum, with the relative-phase $\varphi$ between the condensates playing the role of the pendulum angle. Using a master equation approach we show that the modulation of the inter-site potential barrier stabilizes the $\varphi=\pi$ 'inverted pendulum' coherent state, and protects the fringe visibility. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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