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Ginzburg regime and its effects on topological defect formation

2000; American Physical Society; Volume: 62; Issue: 6 Linguagem: Inglês

10.1103/physrevd.62.065005

1538-4500

Luís M. A. Bettencourt, Nuno D. Antunes, Wojciech H. Zurek,

Theoretical and Computational Physics

The Ginzburg temperature has historically been proposed as the energy scale of formation of topological defects at a second order symmetry breaking phase transition. More recently alternative proposals which compute the time of formation of defects from the critical dynamics of the system, have been gaining both theoretical and experimental support. We investigate, using a canonical model for string formation, how these two pictures compare. In particular we show that prolonged exposure of a critical field configuration to the Ginzburg regime results in no substantial suppression of the final density of defects formed. These results dismiss the recently proposed role of the Ginzburg regime in explaining the absence of topological defects in 4He pressure quench experiments.