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Emergence of a Pseudogap in the BCS-BEC Crossover.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-08-04 , DOI: 10.1103/physrevlett.125.060403
Adam Richie-Halford 1 , Joaquín E Drut 2 , Aurel Bulgac 1
Affiliation  

Strongly correlated Fermi systems with pairing interactions become superfluid below a critical temperature Tc. The extent to which such pairing correlations alter the behavior of the liquid at temperatures T>Tc is a subtle issue that remains an area of debate, in particular regarding the appearance of the so-called pseudogap in the BCS-BEC crossover of unpolarized spin-1/2 nonrelativistic matter. To shed light on this, we extract several quantities of crucial importance at and around the unitary limit, namely, the odd-even staggering of the total energy, the spin susceptibility, the pairing correlation function, the condensate fraction, and the critical temperature Tc, using a nonperturbative, constrained-ensemble quantum Monte Carlo algorithm.

中文翻译:

Pseudogap在BCS-BEC交叉中的出现。

在临界温度以下,具有配对相互作用的强相关费米系统变得超流体 ŤC。这种配对关系在多大程度上改变了液体在温度下的行为Ť>ŤC 这是一个微妙的问题,仍然是一个有争议的领域,尤其是在无极化自旋波的BCS-BEC交叉中所谓伪间隙的出现1个/2非相对论的问题。为了阐明这一点,我们提取了一些在统一极限及其附近的至关重要的量,即总能量的奇偶交错,自旋磁化率,配对相关函数,冷凝物分数和临界温度ŤC,使用非扰动约束集成量子蒙特卡洛算法。
更新日期:2020-08-04
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