Crossover from weak to strong quench in a spinor Bose-Einstein condensate

Abstract

We investigate the early-time dynamics of a quasi-two-dimensional spin-1 antiferromagnetic Bose-Einstein condensate after a sudden quench from the easy-plane to the easy-axis polar phase. The post-quench dynamics shows a crossover behavior as the quench strength $\tilde{q}$ is increased, where $\tilde{q}$ is defined as the ratio of the initial excitation energy per particle to the characteristic spin interaction energy. For a weak quench of $\tilde{q}<1$, long-wavelength spin excitations are dominantly generated, leading to the formation of irregular spin domains. With increasing $\tilde{q}$, the length scale of the initial spin excitations decreases, and we demonstrate that the long-wavelength instability is strongly suppressed for high $\tilde{q}>2$. The observed crossover behavior is found to be consistent with the Bogoliubov description of the dynamic instability of the initial spinor condensate.

arXiv comment7 pages, 6 figures

References in corpus (37)

• Nonequilibrium dynamics of closed interacting quantum systems
• Spinor Bose Condensates in Optical Traps
• Quantum many-body systems out of equilibrium
• Spin domains in ground state spinor Bose-Einstein condensates
• Bose-Einstein condensation with internal degrees of freedom in alkali atom gases
• Spinor Bose-Einstein condensates
• Dynamical quantum phase transitions: a review
• Resonant control of spin dynamics in ultracold quantum gases by microwave dressing
• Dynamics of Bose condensed gases in highly deformed traps
• Spinor Dynamics in an Antiferromagnetic Spin-1 Condensate
• Quantum quenches in a spinor condensate
• Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium
• Spin correlation and Discrete symmetry in Spinor Bose-Einstein Condensates
• Sound propagation in a cylindrical Bose-condensed gas
• Quantum Phase Transition in an Antiferromagnetic Spinor Bose-Einstein Condensate
• Half-Quantum Vortices in an Antiferromagnetic Spinor Bose-Einstein Condensate
• Dynamics in spinor condensates controlled by a microwave dressing field
• Universal coarsening dynamics of a quenched ferromagnetic spin-1 condensate
• Multi-resonant spinor dynamics in a Bose-Einstein condensate
• Quantum Spin Nematic States in Bose-Einstein Condensates
• Spontaneous breaking of spatial and spin symmetry in spinor condensates
• Spin-Dipole Oscillation and Polarizability of a Binary Bose-Einstein Condensate near the Miscible-Immiscible Phase Transition
• Observation of wall-vortex composite defects in a spinor Bose-Einstein condensate
• Tuning universality far from equilibrium
• Spontaneous formation and relaxation of spin domains in antiferromagnetic spin-1 quasi-condensates
• Emergence and scaling of spin turbulence in quenched antiferromagnetic spinor Bose-Einstein condensates
• Rotonlike instability and pattern formation in spinor Bose-Einstein condensates
• Precise measurements on a quantum phase transition in antiferromagnetic spinor Bose-Einstein condensates
• Violation of single-length scaling dynamics via spin vortices in an isolated spin-1 Bose gas
• Static structure factors for a spin-1 Bose-Einstein condensate
• Direct and inverse cascades of spin-wave turbulence in spin-1 ferromagnetic spinor Bose-Einstein condensates
• Fluctuation-induced and symmetry-prohibited metastabilities in spinor Bose-Einstein condensates
• Dynamics of a quenched spin-1 antiferromagnetic condensate in a harmonic trap
• Thermal fluctuations and quantum phase transition in antiferromagnetic Bose-Einstein condensates
• Metastable hard-axis polar state of a spinor Bose-Einstein condensate under a magnetic field gradient
• Thermal spin fluctuations in spinor Bose-Einstein condensates
• Precise measurements on a quantum phase transition in antiferromagnetic spinor Bose-Einstein condensates

Cited by in corpus (5)

• Quantum Elliptic Vortex in a Nematic-Spin Bose-Einstein Condensate
• Many-body effects on second-order phase transitions in spinor Bose-Einstein condensates and breathing dynamics
• Spin-driven stationary turbulence in spinor Bose-Einstein condensates
• Phase diagram of vortices in the polar phase of spin-1 Bose-Einstein condensates
• Faraday patterns, spin textures, spin-spin correlations and competing instabilities in a driven spin-1 antiferromagnetic Bose-Einstein condensate