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Rigorous bounds on transport from causality
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Rigorous bounds on transport from causality
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We use causality to derive a number of simple and universal constraints on dispersion relations, which describe the location of singularities of retarded two-point functions in relativistic quantum field theories. We prove that all causal dissipative dispersion relations have a finite radius of convergence. We then give two-sided bounds on all transport coefficients in units of this radius, including an upper bound on diffusivity.
Forward citations
Cited by 24 Pith papers
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