Effective many-body interactions in one-dimensional dilute Bose gases

被引:0
作者
Kolezhuk, A. K. [1 ,2 ,3 ]
机构
[1] T Shevchenko Natl Univ, Inst High Technol, UA-03022 Kiev, Ukraine
[2] NAS Ukraine, Inst Magnetism, UA-03142 Kiev, Ukraine
[3] MES Ukraine, UA-03142 Kiev, Ukraine
关键词
ultracold atoms; spinor bosons; low-dimensional Bose gas;
D O I
10.1063/10.0001543
中图分类号
O59 [应用物理学];
学科分类号
摘要
We propose a new method of constructing the effective theory for a multicomponent low-dimensional dilute Bose gas. The method is based on obtaining and solving renormalization group equations for all many-body interactions of density-density type in the one-loop approximation. In contrast to the standard approach based on two-body interactions, our method does not rely on the introduction of density-dependent infrared cutoff, and is able to reproduce exactly the leading term in the energy density of the one-dimensional dilute Bose gas, and to obtain the next term with the error of less than 2%.
引用
收藏
页码:798 / 801
页数:4
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