Change of Variable as Borel Resummation of Semiclassical Series

Details Change of Variable as Borel Resummation of Semiclassical Series Change of Variable as Borel Resummation of Semiclassical Series

1997-12-18

arxiv.org/abs/quant-ph/9712039v2

J.Phys.A32:955-976,1999

Physics

Quantum Physics

7 pages, uses article.sty art11.sty, 1 EPS figure

Scientific paper

10.1088/0305-4470/32/6/009

It is shown that a change of variable in 1-dim Schroedinger equation applied to the Borel summable fundamental solutions [Giller] is equivalent to Borel resummation of the fundamental solutions multiplied by suitably chosen $\hbar$-dependent constant. This explains why change of variable can improve JWKB formulae [Giller, Milczarski]. It is shown also that a change of variable alone cannot provide us with the exact JWKB formulae.

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