Formula_18482

\[\frac{d C_{j}^{(i)}(s)}{d s}=\sum_{k \neq j} w_{j k}(s) \exp \left(\frac{i T}{\hbar} \int_{0}^{s}\left[\varepsilon_{j}(u)-\varepsilon_{k}(u)\right] d u\right) C_{k}^{(i)}(s) .\]