Ground-state properties of trapped Bose-Fermi mixtures: Role of exchange correlation

被引：25

作者：

Albus, AP ^{[1
]}

Illuminati, F

Wilkens, M

机构：

[1] Univ Potsdam, Inst Phys, D-14469 Potsdam, Germany

[2] Univ Salerno, Dipartimento Fis, I-84081 Baronissi, SA, Italy

[3] Ist Nazl Fis Mat, I-84081 Baronissi, SA, Italy

来源：

PHYSICAL REVIEW A | 2003年 / 67卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.67.063606

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We introduce density-functional theory for inhomogeneous Bose-Fermi mixtures, derive the associated Kohn-Sham equations, and determine the exchange-correlation energy in local-density approximation. We solve numerically the Kohn-Sham system, and determine the boson and fermion density distributions and the ground-state energy of a trapped, dilute mixture beyond mean-field approximation. The importance of the corrections due to exchange correlation is discussed by a comparison with current experiments; in particular, we investigate the effect of the repulsive potential-energy contribution due to exchange correlation on the stability of the mixture against collapse.

引用

页数：6

共 25 条

[1] Quantum field theory of dilute homogeneous Bose-Fermi mixtures at zero temperature: General formalism and beyond mean-field corrections [J].