【摘要】 研究了一维光晶格中费米气体从BCS区过渡到unitarity区研究相图及周期调制现象.通过调节散射长度与耠合系数对相图的影响,发现在unitarity区,从约瑟夫振荡到振荡自俘获及振荡自俘获到自俘获,存在耦合系数的临界值,同时得到了临界耦合系数与散射长度的关系.更多还原

【Abstract】 The change of phase space and periodic modulation of Fermi gas from the BCS to unitarity is investigated in one-dimensional optical lattice.Through controlling the scattering length and coupling constant in unitarity,we find the critical values(from the Josephson oscillation to the oscillating-phase-type self-trapping and from the latter to the self-trapping),at the same time,we also find the relationship between the critical coupling constants and the scattering length.更多还原