Generalized Nonanalytic Expansions, PT -Symmetry and Large-Order Formulas for Odd Anharmonic Oscillators


The concept of a generalized nonanalytic expansion which involves nonanalytic combinations of exponentials, logarithms and powers of a coupling is introduced and its use illustrated in various areas of physics. Dispersion relations for the resonance energies of odd anharmonic oscillators are discussed, and higher-order formulas are presented for cubic and… (More)


3 Figures and Tables