Pair formation and collapse in imbalanced fermion populations with unequal masses
Pair formation and collapse in imbalanced fermion populations with unequal masses
复制标题
质量不等的不平衡费米子种群中的电子对形成和塌缩
DOI：
10.1209/0295-5075/86/47006
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
V. Rousseau
中科院分区：
文献类型：
--
作者：
G. Batrouni;M. Wolak;F. Hébert;V. Rousseau
我们提出了一种精确量子蒙特卡罗方法，研究了非等质量对载入光学晶格的种群不平衡费米子系统中对形成的影响。我们考虑了三种形式的吸引相互作用，并发现在所有情况下，系统是不稳定的，随着质量差的增加而崩溃，基态变成非均匀的崩溃状态。我们还讨论了正典与大正典系综的问题，以及它在稳定某些相中的作用（如果有的话）。
We present an exact quantum Monte Carlo study of the effect of unequal masses on pair formation in fermionic systems with population imbalance loaded into optical lattices. We have considered three forms of the attractive interaction and find in all cases that the system is unstable and collapses as the mass difference increases and that the ground state becomes an inhomogeneous collapsed state. We also address the question of canonical vs. grand canonical ensemble and its role, if any, in stabilizing certain phases.