Dynamics of topological defects after photoinduced melting of a charge density wave

Charge-density-wave order in a solid can be temporarily "melted" by a strong laser pulse. Here, we use the discrete Gross-Pitaevskii equation on a cubic lattice to simulate the recovery of the CDW long-range phase coherence following such a pulse. Our simulations indicate that the recovery process is dramatically slowed down by the three-dimensional topological defects-CDW dislocations-created as a result of strongly nonequilibrium heating and cooling of the system. Overall, the simulated CDW recovery was found to be remarkably reminiscent of a recent pump-probe experiment in LaTe3.