Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2000-06-23
Phys. Rev. A 63, 056501 (2001).
Physics
Condensed Matter
Disordered Systems and Neural Networks
4 pages, LaTeX
Scientific paper
10.1103/PhysRevA.63.056501
It is argued that there exists the only one inverse of the linear response function $\chi$, i.e. $\chi^{-1}$, which depends symmetrically of its spatial-times variables, see M.K. Harbola, and A. Banerjee, Phys. Rev. A {\bf 60}, 5101 (1999). Some brief comments on this consideration are presented. We show instead, that it is possible to construct the causal inverse also. At the same time we confirm the main statement of M.K. Harbola and A. Banerjee that in fact there is no contradiction between the symmetry and causality.
Amusia Ya. M.
Shaginyan Vasily R.
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