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Precision Measurement of Spin-Dependent Dipolar Splitting in ^{6}Li p-Wave Feshbach Resonances
Shuai Peng1, Sijia Peng1, Lijun Ren1
1Sun Yat-sen University, School of Physics and Astronomy, Zhuhai, Guangdong, China 519082.
Physical Review Letters
|October 12, 2025
Summary
Ultracold atoms reveal magnetic dipolar splitting in p-wave Feshbach resonances. This spin-dependent splitting, observed with high precision, offers insights into molecular spin-orbital configurations and superfluidity control.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Quantum Many-Body Systems
- Condensed Matter Physics
Background:
- P-wave Feshbach resonances are crucial for controlling quantum gases.
- Magnetic dipolar interactions significantly influence the behavior of ultracold atoms.
- Understanding spin-orbital configurations is key to predicting resonance properties.
Purpose of the Study:
- To precisely measure the magnetic dipolar splitting of p-wave Feshbach resonances.
- To investigate the influence of electron spin configuration on resonance splitting.
- To provide experimental benchmarks for theoretical models of dipole-dipole interactions.
Main Methods:
- High-resolution trap-loss spectroscopy on ultracold ^{6}Li atoms.
- Comparison of spin-polarized and spin-mixture triplet states.
- Momentum-resolved absorption imaging for confirmation.
Main Results:
- Sub-milligauss precision achieved in resolving magnetic dipolar splitting.
- Observed a spin-dependent reversal in the splitting structure.
- Demonstrated the interplay between electron spin projection (mS) and orbital angular momentum (mℓ).
Conclusions:
- The study provides a direct experimental probe of spin-orbital interactions in molecular states.
- Results offer a stringent test for theoretical models of dipole-dipole interactions.
- Lays the foundation for controlling pairing in p-wave superfluid systems.
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