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Non-perturbative approximations of path integrals with some applications to quantum statistics

✍ Scribed by V. B. Magalinsky; M. Hayashi; G. Martinez Peña; R. Reyes Sánchez

Book ID
112833749
Publisher
Springer-Verlag,Italian Physical Society
Year
1994
Weight
848 KB
Volume
109
Category
Article
ISSN
0369-3554

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Perturbation theory in the path-integral
Perturbation theory in the path-integral representation and its application to some simple quantum systems
✍ Y. U. E. Perlin; S. H. N. Gifeisman; Pham Van Quyet 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 561 KB

## Abstract In the framework of the path‐integral formalism of nonrelativistic quantum theory the perturbation method is developed. This is based on the cumulative expansion of the partition function in powers of the difference between the classical actions of the exact and trial system. The trial