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Universal off-equilibrium scaling of critical cumulants in the QCD phase diagram
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Exploiting the universality between the QCD critical point and the three dimensional Ising model, closed form expressions derived (arXiv:1506.00645 ) for non-equilibrium critical cumulants on the crossover side of the critical point reveal that they can differ both in magnitude and sign from equilibrium expectations. We demonstrate here that key elements of the Kibble-Zurek framework of non-equilibrium phase transitions can be employed to describe the dynamics of these critical cumulants. Our results suggest that observables sensitive to critical dynamics in heavy-ion collisions should be expressible as universal scaling functions, thereby providing powerful model independent guidance in searches for the QCD critical point.
Forward citations
Cited by 2 Pith papers
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Critical fluid dynamics in two and three dimensions
Direct numerical simulations of stochastic model H give a dynamic critical exponent z ≈ 3 in 3D and z ≈ 2 in 2D, with a crossover from mean-field z = 4 controlled by the renormalized shear viscosity.
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Universal non-equilibrium scaling of cumulants across a critical point
The paper extracts universal non-equilibrium scaling functions for the order parameter and its cumulants up to fourth order in a Z2 scalar field theory with Model A dynamics in two and three dimensions.
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