2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222413The tensor-entanglement renormalization group approach is applied to Hamiltonians that realize a class of topologically ordered states -- string-net condensed states. We analyze phase transitions between phases with and without string-net condensation. These phase transitions change topological order without changing any symmetries. This demonstrates that the tensor-entanglement renormalization group approach can be used to study the phase diagram of a quantum system with topologically ordered phases.5 pages, RevTeX4Strongly Correlated Electronstext