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6 - Time-dependent theory and linear response

Published online by Cambridge University Press:  23 December 2009

Robert K. Nesbet
Robert K. Nesbet
Affiliation:
IBM Almaden Research Center, New York
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Summary

In the quantum theory of interacting electrons, a physically correct theory of time dependence should in principle be formulated as a relativistic quantum field theory. The physical model is that of electrons, each characterized by a probability distribution over space-time events xi, ti, that interact indirectly through the quantized electromagnetic field. This theory is simplified for particular applications by neglecting true radiative effects of quantum electrodynamics, and by passing to the limit of large c, the velocity of light in vacuo.

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Variational Principles and Methods in Theoretical Physics and Chemistry , pp. 77 - 90
Publisher: Cambridge University Press
Print publication year: 2002

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