Elementary excitations in a spin-orbit-coupled spin-1 Bose-Einstein condensate

Abstract

While a spin-orbit-coupled spin-1 Bose-Einstein condensate has been experimentally observed, its elementary excitations remain unclear in the stripe phase. Here, we systematically study the elementary excitations in three distinct phases of a spin-orbit-coupled spin-1 Bose-Einstein condensate. We find that the excitation spectrum as well as the corresponding static response function and structure factor depend strongly on spin-orbit coupling parameters such as the quadratic Zeeman field and the Rabi frequency. In the stripe phase, besides two gapless Goldstone modes, we show the existence of roton excitations. Finally, we demonstrate that quantum phase transitions between these different phases including the zero-momentum, plane wave and stripe phases are characterized by the sound velocities and the quantum depletion.

References in corpus (11)

• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Observation of the supersolid stripe phase in spin-orbit coupled Bose-Einstein condensates
• Anisotropic dynamics of a spin-orbit coupled Bose-Einstein condensate
• Softening of Roton and Phonon Modes in a Bose-Einstein Condensate with Spin-Orbit Coupling
• Measurement of collective excitations in a spin-orbit-coupled Bose-Einstein condensate
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• Superfluid Breakdown and Multiple Roton Gaps in Spin-Orbit Coupled Bose-Einstein Condensates on an Optical Lattice
• Supersolid Striped Droplets in a Raman Spin-Orbit-Coupled System
• Collective excitations in cigar-shaped spin-orbit coupled spin-1 Bose-Einstein condensates
• Quantum phases and collective excitations of a spin-orbit-coupled Bose-Einstein condensate in a one-dimensional optical lattice
• Coherent spin mixing via spin-orbit coupling in Bose gases

Cited by in corpus (13)

• Spectrum and quench-induced dynamics of spin-orbit coupled quantum droplets
• Quantum phases in spin-orbit-coupled Floquet spinor Bose gases
• Stationary and moving bright solitons in Bose-Einstein condensates with spin-orbit coupling in a Zeeman field
• Emergence of unstable avoided crossing in the collective excitations of spin-1 spin-orbit coupled Bose-Einstein condensates
• Supercurrent-carrying supersolid in spin-orbit-coupled Bose-Einstein condensates
• Synthetic spin-orbit coupling for the multispin models in optical lattices
• Fast transport and splitting of spin-orbit-coupled spin-1 Bose-Einstein Condensates
• Tunable nonlinear Landau-Zener tunnelings in a spin-orbit-coupled spinor Bose-Einstein condensate
• Collective excitations and universal coarsening dynamics of a spin-orbit-coupled spin-1 Bose-Einstein condensate
• Thermal amplification and melting of phases in spin-orbit-coupled spin-1 Bose-Einstein condensates
• Modulation of spin-orbit coupled Bose-Einstein condensates: analytical characterization of acceleration-induced transitions between energy bands
• Band-edge superfluid of Bose-Einstein condensates in the spin-orbit-coupled Zeeman lattice
• Emergence of spin-mixed superstripe phases in spin-orbit coupled spin-1 condensate