Abstract
We study the properties of Suzuki's systematic approximations to the exponential operator by calculating the thermodynamic functions of three simple quantum models. We demonstrate that the path-integral representation of the partition function obtained from these approximations can be simplified and made more accurate by constructing Hermitian versions of Suzuki's expressions.
- Received 30 December 1982
DOI:https://doi.org/10.1103/PhysRevA.28.3575
©1983 American Physical Society