Transition barrier at a first-order phase transition in the canonical and 
microcanonical ensemble

Janke, W.; Schierz, P.; Zierenberg, Johannes

doi:10.1088/1742-6596/921/1/012018

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Transition barrier at a first-order phase transition in the canonical and microcanonical ensemble

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Zierenberg, Johannes
Department of Nonlinear Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Janke, W., Schierz, P., & Zierenberg, J. (2017). Transition barrier at a first-order phase transition in the canonical and microcanonical ensemble. Journal of Physics Conference Series, 921: 012018. doi:10.1088/1742-6596/921/1/012018.

Cite as: https://hdl.handle.net/21.11116/0000-0000-302B-A

Abstract

We compare the transition barrier that accompanies a first-order phase transition in the canonical and microcanonical ensemble. This is directly encoded in the probability distributions of standard Metropolis Monte Carlo simulations and a proper microcanonical sampling technique. For the example of droplet formation, we find that in both ensembles the transition barrier scales as expected but that the barrier is much smaller in the microcanonical ensemble. In addition its growth with system size is weaker which will enhance this difference for larger systems. We provide an intuitive physical explanation for this observation.