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Bose-Einstein condensation of erbium
1Institut für Experimentalphysik and Zentrum für Quantenphysik, Universität Innsbruck, Innsbruck, Austria.
Physical Review Letters
|September 26, 2012
Summary
Researchers achieved Bose-Einstein condensation in erbium atoms, observing magnetic Feshbach resonances. This breakthrough enables tunable dipolar Bose-Einstein condensates and offers insights into quantum physics.
Area of Science:
- Atomic physics
- Quantum optics
- Condensed matter physics
Background:
- Bose-Einstein condensation (BEC) is a quantum state of matter.
- Erbium (Er) atoms are magnetically complex, making BEC challenging.
- Feshbach resonances are crucial for controlling atomic interactions.
Purpose of the Study:
- To achieve Bose-Einstein condensation of erbium atoms.
- To investigate magnetic Feshbach resonances in erbium.
- To demonstrate the creation of tunable dipolar Bose-Einstein condensates.
Main Methods:
- Evaporative cooling in an optical dipole trap.
- Production of pure 168Er Bose-Einstein condensates.
- Feshbach spectroscopy to identify loss resonances.
Main Results:
- Achieved pure Bose-Einstein condensates of up to 7x10^4 erbium atoms.
- Observed six magnetic Feshbach resonances within a 3 G magnetic field range.
- Demonstrated a tunable dipolar Bose-Einstein condensate using a low-field resonance.
Conclusions:
- Bose-Einstein condensation of erbium atoms is feasible.
- Erbium atoms exhibit a rich Feshbach resonance spectrum at low fields.
- Tunable dipolar Bose-Einstein condensates can be created, showing characteristic d-wave collapse.
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