This work explores a deformation of Kitaev's toric code that induces a phase transition out of the topologically ordered phase. By placing the model on a cylinder, the bulk global 1-form symmetries separate into distinct boundary operators, allowing us to show that the transition is accompanied by the condensation of all anyons in a given boundary. Using a lower dimensional, i.e., $(1+1)$-dimensional, boundary Hamiltonian, we extract an effective central charge and find a pronounced suppression near ${\beta }_c$, followed by its restoration at strong coupling.

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• Quantum field theory
• Quantum phase transitions
• Topological order
• Topological phase transition
• Conformal field theory
• Lattice models in condensed matter
• Spin lattice models