Linearly Coupled Bose-Einstein Condensates: From Rabi Oscillations and Quasi-Periodic Solutions to Oscillating Domain Walls and Spiral Waves
arXiv:cond-mat/0409113 · doi:10.1103/PhysRevA.70.063605
Abstract
In this paper, an exact unitary transformation is examined that allows for the construction of solutions of coupled nonlinear Schr{ö}dinger equations with additional linear field coupling, from solutions of the problem where this linear coupling is absent. The most general case where the transformation is applicable is identified. We then focus on the most important special case, namely the well-known Manakov system, which is known to be relevant for applications in Bose-Einstein condensates consisting of different hyperfine states of Rb. In essence, the transformation constitutes a distributed, nonlinear as well as multi-component generalization of the Rabi oscillations between two-level atomic systems. It is used here to derive a host of periodic and quasi-periodic solutions including temporally oscillating domain walls and spiral waves.
arXiv comment6 pages, 4 figures, Phys. Rev. A (in press)
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