1. Antiferromagnetic Spinor Condensates in a Two-Dimensional Optical Lattice
- Author
-
Jie Jiang, Micah Webb, Yingmei Liu, Lichao Zhao, and T-Y Dora Tang
- Subjects
Physics ,Condensed Matter::Quantum Gases ,Phase transition ,Optical lattice ,education.field_of_study ,Spinor ,Condensed matter physics ,High Energy Physics::Lattice ,Population ,General Physics and Astronomy ,FOS: Physical sciences ,Superfluidity ,Quantum Gases (cond-mat.quant-gas) ,Phase space ,Phenomenological model ,education ,Condensed Matter - Quantum Gases ,Lattice model (physics) - Abstract
We experimentally demonstrate that spin dynamics and the phase diagram of spinor condensates can be conveniently tuned by a two-dimensional optical lattice. Spin population oscillations and a lattice-tuned separatrix in phase space are observed in every lattice where a substantial superfluid fraction exists. In a sufficiently deep lattice, we observe a phase transition from a longitudinal polar phase to a broken-axisymmetry phase in steady states of lattice-confined spinor condensates. The steady states are found to depend sigmoidally on the lattice depth and exponentially on the magnetic field. We also introduce a phenomenological model that semi-quantitatively describes our data without adjustable parameters.
- Published
- 2014