Modulational instability in binary spin-orbit-coupled Bose-Einstein condensates

Abstract

We study modulation instability (MI) of flat states in two-component spin-orbit-coupled (SOC) Bose-Einstein condensates (BECs) in the framework of coupled Gross-Pitaevskii equations for two components of the pseudospinor wave function. The analysis is performed for equal densities of the components. Effects of the interaction parameters, Rabi coupling, and SOC on the MI are investigated. In particular, the results demonstrate that the SOC strongly alters the commonly known MI (immiscibility) condition, $g_{12}>g_1{g}_2$, for the binary superfluid with coefficients $g_{1,2}$ and $g_{12}$ of the intra- and interspecies repulsive interactions. In fact, the binary BEC is always subject to the MI under the action of the SOC, which implies that the ground state of the system is plausibly represented by a striped phase.

References in corpus (18)

• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Spin-Orbit Coupled Spinor Bose-Einstein Condensates
• Tuning the scattering length with an optically induced Feshbach resonance
• Spin-orbit coupled Bose-Einstein condensates
• The creation of two-dimensional composite solitons in spin-orbit-coupled self-attractive Bose-Einstein condensates in free space
• Bright solitons in spin-orbit-coupled Bose-Einstein condensates
• Spin-orbit coupled Bose-Einstein condensates in a one-dimensional optical lattice
• Modulation instability and solitary wave formation in two-component Bose-Einstein condensates
• Localized modes in quasi-2D Bose-Einstein condensates with spin-orbit and Rabi couplings
• Bose-Einstein Condensates in Spin-Orbit Coupled Optical Lattices: Flat Bands and Superfluidity
• Gap Solitons in Spin-Orbit-Coupled Bose-Einstein Condensates in Optical Lattices
• Localization of a spin-orbit coupled Bose-Einstein condensate in a bichromatic optical lattice
• Bose-Einstein condensates with localized spin-orbit coupling: soliton complexes and spinor dynamics
• Phase separation in a spin-orbit coupled Bose-Einstein condensate
• Exact solitons and manifold mixing dynamics in the spin-orbit-coupled spinor condensates
• Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates
• Fragmentation of Spin-orbit Coupled Spinor Bose-Einstein Condensates
• Vortices and vortex states in Rashba spin-orbit-coupled condensates

Cited by in corpus (15)

• Modulational instability, inter-component asymmetry and formation of quantum droplets in one-dimensional binary Bose gases
• Modulational instability and soliton generation in chiral Bose-Einstein condensates with zero-energy nonlinearity
• Flipping-shuttle oscillations of bright one- and two-dimensional solitons in spin-orbit-coupled Bose-Einstein condensates with Rabi mixing
• Soliton trains after interaction quenches in Bose mixtures
• Faraday patterns in spin-orbit coupled Bose-Einstein condensates
• Quenching dynamics of the bright solitons and other localized states in spin-orbit coupled Bose-Einstein condensates
• Modulational Instabity of Spin-Orbit Coupled Bose-Einstein Condensates in Discrete Media
• Harmonically trapped attractive and repulsive spin-orbit and Rabi coupled Bose-Einstein condensates
• Domain formation of modulation instability in spin-orbit-Rabi coupled Gross-Pitaevskii equation with cubic-quintic interactions
• Patterning by dynamically unstable spin-orbit-coupled Bose-Einstein condensates
• Double unstable avoided crossings and complex domain patterns formation in spin-orbit coupled spin-1 condensates
• Continuous-wave solutions and modulational instability in spinor condensates of positronium
• Dragging spin-orbit-coupled solitons by a moving optical lattice
• Impurity induced Modulational instability in Bose-Einstein condensates
• Bosonic Holes in Quadratic Bosonic Systems