Bloch spectrum
существительное
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(quantum mechanics) A concept relating to energy spectra. Let H be the one-dimensional Schrödinger equation operator H = - \frac{d^2}{dx^2} + U_\alpha, where Uα is a periodic function of period α. The Bloch spectrum of H is the set of values E for which all the solutions of (H − E)φ = 0 are bounded on the whole real axis.
