Effective expression of the Lee-Huang-Yang energy functional for heteronuclear mixtures
Effective expression of the Lee-Huang-Yang energy functional for heteronuclear mixtures
复制标题
异核混合物的Lee-Huang-Yang能量泛函的有效表达
DOI：
10.1103/physreva.100.063636
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发表时间：
2019
影响因子：
2.9
通讯作者：
M. Modugno
中科院分区：
文献类型：
--
作者：
F. Minardi;F. Ancilotto;A. Burchianti;C. D’Errico;C. Fort;M. Modugno
我们考虑一个均匀的异质玻色混合物与接触相互作用的平均场崩溃，即物种间的吸引力等于平均几何种内排斥。我们表明，李黄杨（LHY）的能量泛函是准确地近似的表达式，具有相同的功能形式，在homestrant的情况下。近似的能量泛函由两个指数来表征，这两个指数可以被视为拟合参数。我们证明了这些参数的值，保持两个原子物种的置换下的不变性正是那些homomorphous情况。定量地讨论了偏离LHY能量泛函精确表达式的情况，并描述了一个具体的应用。
We consider a homogeneous heteronuclear Bose mixture with contact interactions at the mean-field collapse, i.e. with interspecies attraction equal to the mean geometrical intraspecies repulsion. We show that the Lee-Huang-Yang (LHY) energy functional is accurately approximated by an expression that has the same functional form as in the homonuclear case. The approximated energy functional is characterized by two exponents, which can be treated as fitting parameters. We demonstrate that the values of these parameters which preserve the invariance under permutation of the two atomic species are exactly those of the homonuclear case. Deviations from the exact expression of LHY energy functional are discussed quantitatively and a specific application is described.
影响因子：
8.6
作者：
Ferrier-Barbut, Igor;Kadau, Holger;Pfau, Tilman
通讯作者：
Pfau, Tilman