Noun
Bloch spectrum
(quantum mechanics) A concept relating to energy spectra. Let H be the one-dimensional Schrödinger equation operator
H
=
−
d
2
d
x
2
+
U
α
,
{\displaystyle 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.