Superconductivity and stripes of strongly-correlated electrons in a magnetic field

We study the t-t’ Hubbard model in a region of the phase diagram expected to show a coexistence between a charge density wave (CDW) and d-wave superconductivity (SC), expanding on previous results for the approximate t-t’-J model. We obtain the ground state for a width four cylinder using DMRG and rely on the Penrose-Onsager criterion for the condensation of Cooper pairs to identify the SC+CDW phase. In this way we are able to obtain results using a much lower bond dimension compared to previous studies. We discuss the possible extension of the results in a presence of a background magnetic field, in particular the creation of extended polarons bounded by vortices and the presence of topological signatures.