Broken-axisymmetry phase of a spin-1 ferromagnetic Bose-Einstein condensate

  title={Broken-axisymmetry phase of a spin-1 ferromagnetic Bose-Einstein condensate},
  author={Keiji Murata and Hiroki Saito and Masahito Ueda},
  journal={Physical Review A},
A spin-1 ferromagnetic Bose-Einstein condensate subject to a certain magnetic field exhibits a broken-axisymmetry phase in which the magnetization tilts against the applied magnetic field due to the competition between ferromagnetism and linear and quadratic Zeeman effects. The Bogoliubov analysis shows that in this phase two Goldstone modes associated with U(1) and SO(2) symmetry breakings exist, in which phonons and magnons are coupled to restore the two broken symmetries. 

Figures from this paper

A binary mixture of spin-1 atoms in a weak magnetic field: the effect of quadratic Zeeman energy
The effect of quadratic Zeeman energy (q) is studied for a binary mixture of spin-1 Bose-Einstein condensates with antiferromagnetic spin interactions in a weak magnetic field. Despite the lowExpand
Thermodynamics and magnetism of antiferromagnetic spinor Bose-Einstein condensates
In this manuscript, we present an experimental study of a Spin 1 Bose gas with antiferromagnetic interactions with ultracold sodium atoms in the F=1 manifold. The three Zeeman components are trappedExpand
Pairing, ferromagnetism, and condensation of a normal spin-1 Bose gas
We find the conditions under which the normal state of a spin-1 Bose gas is unstable toward condensation, ferromagnetism, liquid crystalline-like nematicity, and Bardeen-Cooper-Schrieffer-likeExpand
Ground state of spin-1 Bose-Einstein condensates with spin-orbit coupling in a Zeeman field
We systematically investigate the weakly trapped spin-1 Bose-Einstein condensates with spin-orbit coupling in an external Zeeman field. We find that the mean-field ground state favors either aExpand
Kibble-Zurek mechanism in a trapped ferromagnetic Bose-Einstein condensate.
Spontaneous spin vortex formation in a magnetic phase transition of a trapped spin-1 Bose-Einstein condensate is investigated based on mean-field theory and the Kibble-Zurek phenomena is shown to emerge even in inhomogeneous spinor condensates. Expand
Floquet spinor Bose gases
We introduce a Floquet spinor Bose-Einstein condensate induced by a periodically driven quadratic Zeeman coupling whose frequency is larger than any other energy scales. By examining a spin-1 systemExpand
Spin and mass superfluidity in a ferromagnetic spin-1 Bose-Einstein condensate
The paper investigates the coexistence and interplay of spin and mass superfluidity in a ferromagnetic spin-1 Bose-Einstein condensate. Superfluidity is possible only in the presence of uniaxialExpand
Quantum Kibble-Zurek Mechanism in a Spin-1 Bose-Einstein Condensate.
The satisfactory agreement of the measured scaling exponent with the analytical theory and numerical simulations provides experimental confirmation of the quantum Kibble-Zurek model. Expand
Incommensurate Filling of Ultracold Spin-1 Atoms in Optical Superlattice with a Weak Magnetic Field
The ground states of ultracold spin-1 atoms trapped in an optical superlattice in a weak magnetic field with incommensurate filling of three atoms in one double-well are obtained. It is shown thatExpand
Spinor Bose–Einstein condensates
Abstract An overview of the physics of spinor and dipolar Bose–Einstein condensates (BECs) is given. Mean-field ground states, Bogoliubov spectra, and many-body ground and excited states of spinorExpand