Dynamical generation of dark solitons in spin-orbit-coupled Bose-Einstein condensates

Abstract

We numerically investigate the ground state, the Raman-driving dynamics and the nonlinear excitations of a realized spin-orbit-coupled Bose-Einstein condensate in a one-dimensional harmonic trap. Depending on the Raman coupling and the interatomic interactions, three ground-state phases are identified: stripe, plane wave and zero-momentum phases. A narrow parameter regime with coexistence of stripe and zero-momentum or plane wave phases in real space is found. Several sweep progresses across different phases by driving the Raman coupling linearly in time is simulated and the non-equilibrium dynamics of the system in these sweeps are studied. We find kinds of nonlinear excitations, with the particular dark solitons excited in the sweep from the stripe phase to the plane wave or zero-momentum phase within the trap. Moreover, the number and the stability of the dark solitons can be controlled in the driving, which provide a direct and easy way to generate dark solitons and study their dynamics and interaction properties.

10 pages, 9 figure

References in corpus (23)

• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
• Spin-Orbit Coupled Spinor Bose-Einstein Condensates
• Oscillations and interactions of dark and dark-bright solitons in Bose-Einstein condensates
• $p_x+i{p}_y$ superfluid from s-wave interactions of fermionic cold atoms
• Experimental observation of oscillating and interacting matter wave dark solitons
• Spin Hall effects for cold atoms in a light induced gauge potential
• Bright solitons in spin-orbit-coupled Bose-Einstein condensates
• Bose Hubbard Models with Synthetic Spin-Orbit Coupling: Mott Insulators, Spin Textures and Superfluidity
• Anisotropic dynamics of a spin-orbit coupled Bose-Einstein condensate
• Exotic quantum spin models in spin-orbit-coupled Mott insulators
• Probing non-Abelian statistics of Majorana fermions in ultracold atomic superfluid
• Soliton Magnetization Dynamics in Spin-Orbit Coupled Bose-Einstein Condensates
• Sum rules, dipole oscillation and spin polarizability of a spin-orbit coupled quantum gas
• Symmetry classification of spin-orbit coupled spinor Bose-Einstein condensates
• Relativistic quantum effects of Dirac particles simulated by ultracold atoms
• Delocalization of relativistic Dirac particles in disordered one-dimensional systems and its implementation with cold atoms
• Condensation transition of ultracold Bose gases with Rashba spin-orbit coupling
• Striped states in weakly trapped ultracold Bose gases with Rashba spin-orbit coupling
• Spin-orbit coupled Bose-Einstein condensates in a double well
• Nonlinearity-assisted quantum tunneling in a matter-wave interferometer
• Particle number fractionalization of a one-dimensional atomic Fermi gas with synthetic spin-orbit coupling
• Interferometry with Synthetic Gauge Fields

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• Quasi-one-dimensional spin-orbit- and Rabi-coupled bright dipolar Bose-Einstein-condensate solitons
• Stable multi-peak vector solitons in spin-orbit coupled spin-1 polar condensates
• Harmonically trapped attractive and repulsive spin-orbit and Rabi coupled Bose-Einstein condensates