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We study the evolution of nearest-neighbor entanglement in the onedimensional Ising model with an external transverse field. The system isinitialized as the so called "thermal ground state" of the pure Ising model. Weanalyze properties of generation of entanglement for different regions ofexternal transverse fields. We find that the derivation of the time at whichthe entanglement reaches its first maximum with respect to the reciprocaltransverse field has a minimum at the critical point. This is a new indicatorof quantum phase transition.

Dynamics of entanglement in the transverse Ising model