2013 Fiscal Year Final Research Report
Observation of two-fluid phenomena and measurement of transport coefficients for strongly correlated Fermi gases
| Project/Area Number |
23684033
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 量子エレクトロニクス / 超流動 / 状態方程式 / 熱力学 / レーザー冷却 / ボース凝縮 / フェルミ縮退 / BCS-BECクロスオーバー |
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| Research Abstract |
We developed a simultaneous laser cooling system of lithium 6 atoms and lithium 7 atoms in order to investigate two-fluid phenomena which have shown in metal superconductors and superfluid helium. Both atomic spices were collected up to one hundred million atoms within 30s. We succeeded in loading cold atoms from a MOT into an optical dipole trap with an efficiency of 5%. After an evaporative cooling process, 100,000 of atoms reached a temperature down to T/TF=0.05 and they showed a superfluid phase transition. Furthermore, we measured a temperature of interacting lithium 6 atoms by mixing lithium 7 atoms in an optical trap as a thermometer at a BCS interaction regime. We are ready to investigate two-fluid phenomena.
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