セミナー情報

第59回 原研・兵県大合同コロキウム

日時: 平成21年6月30日(火) 16:00〜
Date and time: 30th June (Tue.) 16:00〜
場所: 兵庫県立大学理学部 研究棟7階談話室(739号室)
Place: University of Hyogo, Lecture room (room 739) 7F
題目: 光格子中の3成分内部自由度を持つ冷却フェルミ原子の有限温度における性質
Title: Finite-temperature properties of attractive three-component fermionicatoms in optical lattices
講演者: 菅 誠一郎 氏 (兵庫県立大学)
Speaker: Prof. Seiichiro Suga (University of Hyogo)
Abstract:

Cold atoms have been investigated intensively. Recently, 6Li fermionic atoms with a balanced population of three internal degrees of freedom (colors) have succeeded in creating. In the experiment, anomalous increase of the three-body loss was discussed in connection with torionic states, where three atoms with different colors form singlet bound states. In this talk, I will show our recent results for zero- and finite-temperature properties of attractive three-component fermionic atoms in optical lattices. By using a self-energy functional approach, we find that the second order transition from a Fermi liquid to a color superfluid (CSF), where atoms from two of three colors form the Cooper pairs, occurs with increasing the strength of the attrtactive interaction. In the strong attractive interaction region, the first order transitions from the CSF to the trionic state takes place. In the higher temperature region, a crossover between the Fermi liquid and the trionic state is found. I will also discuss the effects of the anisotropy of the attractive interactions.