Stabilization of Nonlinear Lattices: A Route to Superfluidity and Hysteresis
arXiv:1801.08959 · doi:10.1103/PhysRevA.98.013625
Abstract
The Bloch states of a Bose-Einstein condensates (BECs) in pure nonlinear lattices (NLs) are dynamically unstable, so that they cannot show superfluidity. We overcome this problem by finding that the two-component BECs in NLs can be stabilized by the coherent linear coupling. Furthermore, in the limit of the strong coherent coupling, the lowest Bloch band in the whole Brillouin zone can be dynamically stable. We also find a hysteretic behavior with loop-like structure in the Bloch band resembling the so-called "swallowtail" loop. The dynamical stabilization and hysteretic behavior can be observed in experiments by current technology.
5 pages, 4 figures
References in corpus (12)
- Tuning the scattering length with an optically induced Feshbach resonance
- Superfluidity of Bose-Einstein Condensate in An Optical Lattice: Landau-Zener Tunneling and Dynamical Instability
- Controlling a magnetic Feshbach resonance with laser light
- Many-body Landau-Zener dynamics in coupled 1D Bose liquids
- Narrow Line Photoassociation in an Optical Lattice
- Combination of a magnetic Feshbach resonance and an optical bound-to-bound transition
- Superfluidity and Stabilities of a Bose-Einstein condensate with periodically modulated interatomic interaction
- Nonlinear looped band structure of Bose-Einstein condensates in an optical lattice
- Nonlinear Phenomena of Ultracold Atomic Gases in Optical Lattices: Emergence of Novel Features in Extended States
- Precise measurements of optical Feshbach resonances of Yb atoms
- Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice
- Exact States in Waveguides With Periodically Modulated Nonlinearity