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 quartic potentials.
U. D. Jentschura et al., "Generalized Nonanalytic Expansions, PT-Symmetry and Large-Order Formulas for Odd Anharmonic Oscillators," Symmetry, Integrability and Geometry: Methods and Applications (SIGMA): Proceedings of the VIIth Workshop ''Quantum Physics with Non-Hermitian Operators (2008, Benasque, Spain), vol. 5, Institute of Mathematics, Jan 2009.
The definitive version is available at https://doi.org/10.3842/SIGMA.2009.005
Proceedings of the VIIth Workshop ''Quantum Physics with Non-Hermitian Operators (2008: Jun. 29- Jul. 11, Benasque, Spain)
Keywords and Phrases
Asymptotics; Higher-order Corrections; Instantons; PT-symmetry
International Standard Serial Number (ISSN)
Article - Conference proceedings
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