Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.180604
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Funding
- Indo-French Centre for the promotion of advanced research (IFCPAR) [5604-2]
- Deutsche Forschungsgemeinschaft (DFG) [KR 3844/2-1]
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Nonlinear response theory, in contrast to linear cases, involves (dynamical) details, and this makes application to many-body systems challenging. From the microscopic starting point we obtain an exact response theory for a small number of coarse-grained degrees of freedom. With it, an extrapolation scheme uses near-equilibrium measurements to predict far-from-equilibrium properties (here, second order responses). Because it does not involve system details, this approach can be applied to many-body systems. It is illustrated in a four-state model and in the near critical Ising model.
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