论文标题
二维Hubbard模型中的伪PSEUDOGAP开放：功能重归于分析
Pseudogap opening in the two-dimensional Hubbard model: A functional renormalization group analysis
论文作者
论文摘要
使用最近引入的功能重归其化组的多旋转扩展，我们计算了半填充和弱耦合的二维Hubbard模型的频率和动量依赖性自我能量。我们表明，在顶点的截断义方法中，必须采用自我能量流程方程的schwinger-dyson形式，以捕获伪造的开口。我们对流程方案在正确考虑抗磁性波动的影响方面所起的关键作用提供了一种分析理解。对于所得的伪群，我们对其演变进行了详细的数值分析，以温度，相互作用强度和环顺序。
Using the recently introduced multiloop extension of the functional renormalization group, we compute the frequency- and momentum-dependent self-energy of the two-dimensional Hubbard model at half filling and weak coupling. We show that, in the truncated-unity approach for the vertex, it is essential to adopt the Schwinger-Dyson form of the self-energy flow equation in order to capture the pseudogap opening. We provide an analytic understanding of the key role played by the flow scheme in correctly accounting for the impact of the antiferromagnetic fluctuations. For the resulting pseudogap, we present a detailed numerical analysis of its evolution with temperature, interaction strength, and loop order.
