Trapped unitary two-component Fermi gases with up to ten particles
Trapped unitary two-component Fermi gases with up to ten particles
复制标题
DOI：
10.1103/physreva.92.013608
复制
发表时间：
2015-04
影响因子：
2.9
通讯作者：
X. Yin;D. Blume
中科院分区：
文献类型：
--
作者：
X. Yin;D. Blume
零程相互作用二元费米气体的性质具有普适性。本文采用显式关联高斯基组展开方法研究了球对称外简谐约束下的等质量双组分费米气体。在么正性，我们确定了系统的基态能量与多达10个粒子通过有限范围的两体势的偶数和奇数的粒子相互作用。我们外推的能量的零范围的限制，使用一种新的计划，删除的线性，在某些情况下，也二次依赖的基态能量的两体范围。我们外推的零程能量与文献中的结果进行了比较。我们还计算了两体Tan接触和结构性质。
The properties of two-component Fermi gases with zero-range interactions are universal. We use an explicitly correlated Gaussian basis set expansion approach to investigate small equal-mass two-component Fermi gases under spherically symmetric external harmonic confinement. At unitarity, we determine the ground state energy for systems with up to ten particles interacting through finite-range two-body potentials for both even and odd number of particles. We extrapolate the energies to the zero-range limit using a novel scheme that removes the linear and, in some cases, also the quadratic dependence of the ground state energies on the two-body range. Our extrapolated zero-range energies are compared with results from the literature. We also calculate the two-body Tan contact and structural properties.