Related Experiment Videos
Electronic interaction anisotropy between open-shell lanthanide atoms and helium from cold collision experiment
1Harvard-Massachusetts Institute of Technology Center for Ultracold Atoms, Department of Physics, Harvard University, Cambridge, 02138, USA. rkrems@chem.ubc.ca
The Journal of Chemical Physics
|September 24, 2005
Summary
The electronic interaction anisotropy between rare-earth atoms and helium is extremely small, as shown by Zeeman relaxation measurements in cold helium-3 gas. This finding has implications for understanding interatomic forces in quantum systems.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Quantum Chemistry
- Condensed Matter Physics
Background:
- Zeeman relaxation measurements in cold gases provide insights into interatomic interactions.
- Rare-earth atoms with nonzero electronic orbital angular momenta interact with helium.
- Understanding these interactions is crucial for quantum simulations and cold atom experiments.
Purpose of the Study:
- To quantify the electronic interaction anisotropy between rare-earth atoms and helium.
- To determine the energy splitting between adiabatic potentials arising from these interactions.
Main Methods:
- Utilized measurements of Zeeman relaxation in a cold gas of helium-3.
- Analyzed data from previous experiments (Hancox et al., Nature 2004).
Main Results:
- The electronic interaction anisotropy between rare-earth atoms and helium is found to be extremely small.
- The energy splitting between adiabatic potentials does not exceed 0.09 cm(-1) for relevant interatomic distances.
- This includes the region of van der Waals interaction minima.
Conclusions:
- The study demonstrates a very weak anisotropic interaction between rare-earth atoms and helium.
- This finding is significant for theoretical models and experimental control of cold atom systems involving these species.
- The results suggest that simplified interaction models may be applicable in certain regimes.