Nonlinear localized modes in dipolar Bose-Einstein condensates in optical lattices
- Departamento de Fisica, Facultad de Ciencias, Universidad de Chile, Santiago (Chile)
- Physical-Technical Institute, Uzbek Academy of Sciences, 2-b, G. Mavlyanov str., 100084 Tashkent (Uzbekistan)
Modulational instability and discrete matter wave solitons in dipolar BECs, loaded into a deep optical lattice, are investigated analytically and numerically. The process of modulational instability of nonlinear plane matter waves in a dipolar nonlinear lattice is studied and the regions of instability are established. The existence and stability of bulk discrete solitons are analyzed analytically and confirmed by numerical simulations. In marked contrast with the usual discrete nonlinear Schroedinger behavior (no dipolar interactions), we found a region where the two fundamental modes are simultaneously unstable, allowing enhanced mobility across the lattice for large norm values. To study the existence and properties of surface discrete solitons, an analysis of the dimer configuration is performed. The properties of symmetric and antisymmetric modes including stability diagrams and bifurcations are investigated in closed form. For the case of a bulk medium, properties of fundamental on-site and intersite localized modes are analyzed. On-site and intersite surface localized modes are studied, and we find that they do not exist when nonlocal interactions predominate with respect to local ones.
- OSTI ID:
- 22068766
- Journal Information:
- Physical Review. A, Vol. 84, Issue 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
Similar Records
Three-dimensional solitons in coupled atomic-molecular Bose-Einstein condensates
Multicomponent gap solitons in spinor Bose-Einstein condensates