研究・研究者
研究会・セミナー
| 演 題 | 「エルビウム原子のボースアインシュタイン凝縮」 |
|---|---|
| 日 時 | 2012年07月05日(木) 16:00 |
| 場 所 | 分子科学研究所 研究棟 201セミナー室 |
| 概 要 | We report on the achievement of the first Bose-Einstein condensation (BEC) of erbium atoms. This unconventional atomic species belonging to the lanthanide series possesses a large magnetic moment of seven Bohr magneton, making this species an ideal system for studying novel quantum phenomena arising from strong dipole-dipole interaction. Atoms captured in a magneto-optical trap operating on the intercombination line are directly loaded into an optical dipole trap (ODT). Evaporative cooling in an ODT shows a remarkable efficiency, allowing us to achieve a pure condensate containing 7 104 atoms. In addition, a Feshbach resonance found at a very low magnetic field of around 1G allows us to tune the contact interaction precisely. When the contact interaction is tuned close to zero, we observe a d-wave collapse of the Bose-Einstein condensate, which provides a striking signature of strongly dipolar quantum gases, as previously shown in the Stuttgart experiment for chromium. |
| お問合せ先 | 大森賢治 |
