Split and overlapped binary solitons in optical lattices
arXiv:1504.00282 · doi:10.1103/PhysRevA.92.013639
Abstract
We analyze the energetic and dynamical properties of bright-bright (BB) soliton pairs in a binary mixture of Bose-Einstein condensates subjected to the action of a combined optical lattice, acting as an external potential for the first species, while modulating the intraspecies coupling constant of the second. In particular, we use a variational approach and direct numerical integrations to investigate the existence and stability of BB solitons in which the two species are either spatially separated (split soliton) or located at the same optical lattice site (overlapped soliton). The dependence of these solitons on the interspecies interaction parameter is explicitly investigated. For repulsive interspecies interaction we show the existence of a series of critical values at which transitions from an initially overlapped soliton to split solitons occur. For attractive interspecies interaction only single direct transitions from split to overlapped BB solitons are found. The possibility to use split solitons for indirect measurements of scattering lengths is also suggested.
9 pages, 10 figures
References in corpus (16)
- Many-Body Physics with Ultracold Gases
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Dynamical control of matter-wave tunneling in periodic potentials
- Tuning the scattering length with an optically induced Feshbach resonance
- Coherent control of dressed matter waves
- Controlled formation and reflection of a bright solitary matter-wave
- Long-living Bloch oscillations of matter waves in optical lattices
- Nonlinear Bose-Einstein-condensate Dynamics Induced by a Harmonic Modulation of the s-wave Scattering Length
- Localized modes of binary mixtures of Bose-Einstein condensates in nonlinear optical lattices
- Nonlinearity induced destruction of resonant tunneling in the Wannier-Stark problem
- Symbiotic gap and semi-gap solitons in Bose-Einstein condensates
- Critical wetting, first-order wetting and prewetting phase transitions in binary mixtures of Bose-Einstein condensates
- Mixed symmetry localized modes and breathers in binary mixtures of Bose-Einstein condensates in optical lattices
- Matter-wave 2D solitons in crossed linear and nonlinear optical lattices
- Long lived matter waves Bloch oscillations and dynamical localization by time dependent nonlinearity management
- Dynamical generation of interwoven soliton trains by nonlinear emission in binary Bose-Einstein condensates