Projection operator formulation for second order response

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.

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Year of publication:	1987
Authors:	Sauermann, G. ; Just, W. ; Karmann, K.-P. ; Yu-mei, Zhang
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 140.1987, 3, p. 597-611
Publisher:	Elsevier

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10010586934