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hep-th2026
Finite path integral limits work in cases where the perturbative series is not Borel summable
Ariel Edery
The perturbative expansion in powers of the coupling of observables in quantum field theory and quantum mechanics is known to yield an asymptotic series. If the original physical s…
hep-th2025
Convergent perturbative series via finite path integral limits: application to energy at strong coupling of the anharmonic oscillator
Ariel Edery
Solving quantum field theories at strong coupling remains a challenging task. The main issue is that the usual perturbative series are asymptotic series which can be useful at weak…
hep-th2024★ 3 cited
Two types of series expansions valid at strong coupling
Ariel Edery
It is known that perturbative expansions in powers of the coupling in quantum mechanics (QM) and quantum field theory (QFT) are asymptotic series. This can be useful at weak coupli…