Phase Diagram of the Random Heisenberg Antiferromagnetic Spin-1 Chain
Phase Diagram of the Random Heisenberg Antiferromagnetic Spin-1 Chain
We present a new perturbative real space renormalization group (RG) to study random quantum spin chains and other one-dimensional disordered quantum systems. The method overcomes problems of the original approach which fails for quantum random chains with spins larger than S=1/2. Since it works even for weak disorder, we are …