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Spin texture in Bose-Einstein condensates confined in spin-dependent optical lattices
Shu-Song Wang1, Su-Ying Zhang2
1Institute of Theoretical Physics, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, 030006, Shanxi, China.
Scientific Reports
|October 15, 2025
Summary
We studied rotating two-component Bose-Einstein condensates in optical lattices. The spin texture structure, crucial for quantum simulations, can be precisely controlled by adjusting lattice parameters and rotation speed.
Area of Science:
- Quantum physics
- Atomic, molecular, and optical physics
Background:
- Bose-Einstein condensates (BECs) are quantum states of matter.
- Two-component BECs exhibit complex spin textures.
- Optical lattices create tunable potentials for ultracold atoms.
Purpose of the Study:
- Investigate the ground state of rotating two-component BECs.
- Analyze the spin texture structure in combined potentials.
- Explore methods for manipulating spin textures.
Main Methods:
- Theoretical investigation of BECs in optical and harmonic potentials.
- Definition of a generalized momentum operator.
- Derivation of velocity and spin distribution.
Main Results:
- Striped density distribution observed.
- Concentric circular velocity contours for each stripe.
- Spin texture structure with specific magnetic moment variations.
Conclusions:
- Spin texture is linked to velocity distribution.
- Lattice period and phase control texture regions.
- Tunable manipulation of spin texture is achievable.
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