Fulde-Ferrell-Like Molecular States in Spin-Orbit Coupled Ultracold Fermi Gases

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 255-258
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0253-6102/68/2/255

摘要

We study the molecular state in three-component Fermi gases with a single impurity of 6 Li immersing in a no-interacting Fermi sea of 40 K in the presence of an equal weight combination of Rashba-type and Dresselhaustype spin-orbit coupling.In the region where the Fermi sea has two disjointed Fermi surfaces,we find that there are two Fulde-Ferrell-like molecular states with dominating contributions from the lower helicity branch.Decreasing the scattering length or the spin-orbit coupled Fermi energy,we find the Fulde Ferrell-like molecular state with small center-of-mass momentum is always energy favored and the other one will suddenly disappear.