Frohlich Regime

The S matrix, then, would be independent of P(x ) in the zero-momentum limit in the infinite volume case, the Frohlich regime would be stable against external perturbations exciting soft (zero momentum) modes. 

It is worthwhile noticing that hysteresis has been observed in all cases in our model then the electret would appear different in subsequent cycles (alternance of Davydov and Frohlich regimes) during the cell lifetime, giving rise to a nonstationary evolution instead of a periodic one (on a time scale comparable with the lifetime of the biological system under consideration). 

In the following sections we present such a unified treatment. First we sketch qualitatively the interplay between Davydov and Frohlich mechanisms (Section 2). Then we present an account of both of them and we discuss the transition from one regime to the other (Section 3). Finally we discuss the phenomenological implications of the theoretical scheme and the available supporting experimental evidence (Section 4). 

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