玻色-爱因斯坦区域费米气体的DC约瑟夫森效应
DC Josephson Effect with Fermi gases in the Bose-Einstein regime
摘要：
我们证明了在复合分子的BEC体系中，超冷费米子气体的直流约瑟夫森效应可以用非线性薛定谔方程（NLSE）来描述。通过比较我们的结果与Bogoliubov-de Gennes计算[物理评论快报。99，040401（2007）]我们发现，我们的超流NLSE，它概括了Gross-Pitaevskii方程，考虑到正确的状态方程，是可靠的BEC制度的BCS-BEC交叉到非常大的（正）散射长度的限制。我们还预测，约瑟夫森电流显示相关的超越平均场效应。
英文摘要：
We show that the DC Josephson effect with ultracold fermionic gases in the BEC regime of composite molecules can be described by a nonlinear Schrodinger equation (NLSE). By comparing our results with Bogoliubov-de Gennes calculations [Phys. Rev. Lett. 99, 040401 (2007)] we find that our superfluid NLSE, which generalizes the Gross-Pitaevskii equation taking into account the correct equation of state, is reliable in the BEC regime of the BCS-BEC crossover up to the limit of very large (positive) scattering length. We also predict that the Josephson current displays relevant beyond mean-field effects.
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