论文标题
与平均场理论 +扰动方法的现场相互作用引起的峰值浸入特征
On-site-interaction-induced Peak-dip-hump Characteristics with the Mean Field Theory + Perturbation Approach
论文作者
论文摘要
几十年来，无论询问多么多询问，使用扰动方法解决强大的耦合模型的困难仍然存在。在当前的工作中，典型的平均野外理论程序将强大的哈密顿量转化为弱耦合，可以在扰动方法中解决。用哈伯德现场相互作用的二维游离电子气体的哈密顿量计算为新程序的测试。因此，复制了丘疹峰值 - 浸入峰的光谱特征。将结果与过去的理论研究进行了比较，例如量子蒙特卡洛法，密度矩阵重新归一化组，张量网络方法等与光谱曲线非常吻合。
For decades, the difficulty of tackling a strong coupling model with a perturbative approach remained regardless of numerous inquiries. In the current work, a typical mean field theory procedure transforms a strong coupling Hamiltonian into a weak one, which can be solved within a perturbative approach. The Hamiltonian of 2-dimensional free electron gas with Hubbard on-site interaction is calculated as a test of the new procedure. Consequently, the spectral characteristics of the cuprates peak-dip-hump are reproduced. The result is compared with the past theoretical investigations, e.g., quantum Monte Carlo method, density matrix renormalization group, tensor network methods, etc., which agree well with the spectral curve.
