Integral Equations for Memory Functions Involving Projection Operators
- 1 January 1973
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 7 (1) , 182-187
- https://doi.org/10.1103/physreva.7.182
Abstract
Kinetic equations for the phase—space-time correlation functions contain memory functions that involve projection operators. It is shown that these memory functions can be represented by integral equations involving only real-time correlation functions, thereby eliminating the projection operators completely in the kinetic description of correlation functions. The weak-coupling and density expansions of the memory functions have been obtained through these integral equations.Keywords
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