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Probing anisotropic superfluidity in atomic Fermi gases with Rashba spin-orbit coupling
Hui Hu1, Lei Jiang, Xia-Ji Liu
1ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122, Australia.
Physical Review Letters
|December 21, 2011
Summary
We explored strongly interacting Fermi gases with Rashba spin-orbit coupling. This interaction creates anisotropic superfluidity with mixed singlet-triplet bound pairs, offering insights into synthetic gauge fields.
Area of Science:
- Quantum physics
- Condensed matter physics
- Atomic physics
Background:
- Synthetic gauge fields offer new avenues for quantum simulation.
- Spin-orbit coupling is crucial for realizing novel quantum states.
Purpose of the Study:
- Investigate a strongly interacting Fermi gas with Rashba spin-orbit coupling.
- Explore the emergence of anisotropic superfluidity.
- Characterize the properties of bound pairs with mixed singlet and triplet components.
Main Methods:
- Theoretical investigation of a Fermi gas.
- Inclusion of Rashba spin-orbit coupling.
- Calculation of physical quantities: momentum distribution, spectral function, and spin structure factor.
Main Results:
- Lifting of spin degeneracy due to spin-orbit interaction.
- Emergence of bound pairs with mixed singlet and triplet components.
- Formation of an anisotropic superfluid.
Conclusions:
- The study provides a theoretical framework for understanding anisotropic superfluidity in Fermi gases.
- The findings pave the way for realizing Fermi gases with synthetic non-Abelian gauge fields.
- Characterization of key physical quantities offers experimental signatures.
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