| 单词 | perturbation equation |
| 释义 | > as lemmasperturbation equation b. Physics and Mathematics. A slight alteration of the mathematical description of a physical system, esp. of the conditions which a solution of Schrödinger's equation must satisfy, from a relatively simple or directly soluble form to one which may be studied by comparison with it; a slight alteration of an equation, etc., by a small amount. Frequently attributive, as perturbation equation, perturbation method, etc. ΘΚΠ the world > matter > physics > quantum theory > quantum mechanics > wave mechanics > [noun] > perturbation perturbation1835 1835 W. R. Hamilton in Philos. Trans. (Royal Soc.) 125 106 A remarkable result, which includes the whole theory of perturbation. 1899 Q. Jrnl. Math. 30 47 It is proposed to follow the theory of perturbations in the problems of mechanics in the order of its historical development from Lagrange to Lie. 1937 E. C. Kemble Fund. Princ. Quantum Mech. xi. 380 In quantum mechanics..perturbation methods are of fundamental importance due to the fact that so few problems can be rigorously solved by direct methods. 1956 R. H. Atkin Math. & Wave Mech. xi. 241 The method of perturbations is a practical technique for approximating to such solution. 1973 M. Alonso & H. Valk Quantum Mech. v. 202 Expressions (5.8–19) through (5.8–23) constitute the Rayleigh–Schroedinger perturbation series. 1993 Jrnl. Plasma Physics 49 6 To obtain the perturbed magnetic field in the gas cylinder..we use the relevant perturbation equations for the magnetic field. < as lemmas |
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