An infinite projected entangled pair state (iPEPS) is a tensor network ansatz to represent 2D ground states in the thermodynamic limit. Thanks to several methodological advances in recent years, iPEPS has become a powerful tool for the study of 2D strongly correlated systems, in particular models where quantum Monte Carlo fails due to the negative sign problem. In this talk I will report on recent progress in simulating the doped 2D Hubbard model which exhibits a very strong competition between different low-energy states, including a uniform d-wave superconducting state and different types of stripe states. I will show that period-4 stripes, which are typically observed in experiments on the cuprates, get energetically favored at 1/8 doping upon adding a realistic next-nearest neighbor hopping to the model. Finally, I will briefly highlight other recent advances with iPEPS, including the simulation of SU(N) Hubbard models, thermal states, and excitations.

You can access the meeting through this link:
https://tum-conf.zoom.us/j/92392266655?pwd=ai9EOUlweWY4U3JTUUdJMUhYeFA3…

(Meeting ID: 923 9226 6655, Password: 919332)