Projection operator formulation for second order response

G. Sauermann, W. Just, K.-P. Karmann and Zhang Yu-mei

Physica A: Statistical Mechanics and its Applications, 1987, vol. 140, issue 3, 597-611

Abstract: Combined first and second order dynamic susceptibilities for a set of observables are expressed by a matrix resolvent operator in Liouville-space. A well-defined triangular projector is introduced to rewrite second order susceptibilities in terms of frequencies and memory functions. For these a Markovian type of approximation is established and connected with quantities of first order response.

Date: 1987
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:140:y:1987:i:3:p:597-611

DOI: 10.1016/0378-4371(87)90083-5

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