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- Title
Nematic tensor evolution in the partially-polarized spin-1 Bose–Einstein condensates.
- Authors
Trukhanova, Mariya Iv.
- Abstract
We develop the complete hydrodynamical description of the spin-1 partially polarized Bose–Einstein condensate (BEC), based on the many-particle quantum hydrodynamic formalism. We derive the continuity equation, momentum balance equation, spin evolution and nematicity evolution equations considering the spin–spin dipole long-range interactions and short-range interactions between partially spin-polarized atoms of condensate. The nematic or quadrupolar tensor plays an important role in the experiments of spin-nematic squeezing. We predict the influence of the spin–spin dipole interactions and spin torque force on the dynamics of nematic tensor. The collective modes for phonons and magnons are predicted for the ferromagnetic phase of spinor condensate, where the spin–spin and short-range interactions modify the dispersion equation.
- Subjects
BOSE-Einstein condensation; MAGNONS; SPIN-spin interactions; DIPOLE interactions; EVOLUTION equations; SPIN waves; PHONONS
- Publication
Modern Physics Letters B, 2021, Vol 35, Issue 18, pN.PAG
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S021798492150305X