ar X iv : h ep - t h / 01 09 18 5 v 2 9 N ov 2 00 1 Once again : Instanton method vs . WKB
نویسندگان
چکیده
A recent analytic test of the instanton method performed by comparing the exact spectrum of the Lamé potential (derived from representations of a finite dimensional matrix expressed in terms of su(2) generators) with the results of the tight–binding and instanton approximations as well as the standard WKB approximation is commented upon. It is pointed out that in the case of the Lamé potential as well as others the WKB–related method of matched asymptotic expansions yields the exact instanton result as a result of boundary conditions imposed on wave functions which are matched in domains of overlap.
منابع مشابه
ar X iv : h ep - t h / 01 09 18 5 v 3 2 0 N ov 2 00 1 Once again : Instanton method vs . WKB
A recent analytic test of the instanton method performed by comparing the exact spectrum of the Lamé potential (derived from representations of a finite dimensional matrix expressed in terms of su(2) generators) with the results of the tight–binding and instanton approximations as well as the standard WKB approximation is commented upon. It is pointed out that in the case of the Lamé potential ...
متن کاملar X iv : h ep - t h / 01 09 18 5 v 1 2 4 Se p 20 01 Once again : Instanton method vs . WKB
A recent renewed claim that the instanton method and the WKB method do not lead to identical results in the 1–loop approximation is repudiated. It is pointed out that the WKB method, or its equivalent, yields the instanton result provided the boundary conditions are imposed on wave functions which are properly matched in domains of overlap.
متن کاملar X iv : h ep - p h / 01 11 04 9 v 1 6 N ov 2 00 1 The QCD Phase Diagram and Explosive Astrophysics
متن کامل
ar X iv : h ep - p h / 01 11 39 6 v 1 2 9 N ov 2 00 1 SOFT INTERACTIONS
A brief introduction to the theory and phenomenology of soft interactions is given, focusing on total and elastic cross sections and multiparticle production.
متن کامل