Related Experiment Video
Updated: Jan 15, 2026

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
Published on: July 4, 2016
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.
Abstract:
The magnetic dipolar splitting of a p-wave Feshbach resonance is governed by the spin-orbital configuration of the valence electrons in the triplet molecular state. We perform high-resolution trap-loss spectroscopy on ultracold ^{6}Li atoms to resolve this splitting with sub-milligauss precision. By comparing electron-spin-polarized (|m_{S}|=1) and electron-spin-mixture (m_{S}=0) configurations of the triplet state, we observe a clear spin-dependent reversal in the splitting structure, confirmed via momentum-resolved absorption imaging. This behavior directly reflects the interplay between electron spin projection m_{S} and orbital angular momentum m_{ℓ} in the molecular states. Our results provide a stringent benchmark for dipole-dipole interaction models and lay the groundwork for controlling the pairing in p-wave superfluid systems.
Related Concept Videos
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
Spin–Spin Coupling Constant: Overview
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
¹H NMR Signal Multiplicity: Splitting Patterns
¹³C NMR: ¹H–¹³C Decoupling
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
NMR Spectroscopy: Spin–Spin Coupling

