Quench dynamics of topological quantum phase transition in Wen-plaquette model

Details Quench dynamics of topological quantum phase transition in Wen-plaquette model Quench dynamics of topological quantum phase transition in Wen-plaquette model

2010-11-21

arxiv.org/abs/1011.4667v5

Phys. Rev. A 83, 062113 (2011)

Physics

Quantum Physics

8 pages, 5 figures,add new content

Scientific paper

10.1103/PhysRevA.83.062113

We study the quench dynamics of the topological quantum phase transition in the two-dimensional transverse Wen-plaquette model, which has a phase transition from a Z2 topologically ordered to a spin-polarized state. By mapping the Wen-plaquette model onto a one-dimensional quantum Ising model, we calculate the expectation value of the plaquette operator Fi during a slowly quenching process from a topologically ordered state. A logarithmic scaling law of quench dynamics near the quantum phase transition is found, which is analogous to the well-known static critical behavior of the specific heat in the one-dimensional quantum Ising model.

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