Abstract

Traditional DMRG Approaches for 2D Frustrated and Doped Quantum Systems

Steve White
University of California, Irvine (UCI)

The density matrix renormalization group (DMRG) is primarily a 1D simulation method for quantum lattice systems which can also study 2D strips and ladders. Recent generalizations of DMRG (e.g. PEPS) may allow much more efficient simulations for large 2D systems, but the traditional finite width strip approach is still very competitive. Using this approach, I will discuss two systems of current interest: the triangular lattice Heisenberg model, a frustrated system where RVB and antiferromagnetic phases compete, and the doped t-J model, where stripes and d-wave superconductivity may coexist or compete.