Explicit Description of the Zassenhaus Formula

2017/02/28 by Tetsuji Kimura · 1 citation
Physics and Astronomy · Mathematics · #math-ph #hep-th #math.MP #quant-ph

paper · pdf · doi:10.1093/ptep/ptx044

published as Prog. Theor. Exp. Phys. (2017) 2017 (4): 041A03 · 5 pages, version accepted for publication in PTEP

arxiv created 2017/04/06 · arxiv updated 2017/05/02

Abstract

We explicitly describe an expansion of e^A+B as an infinite sum of the products of B multiplied by the exponential function of A. This is the explicit description of the Zassenhaus formula. We also express the Baker-Campbell-Hausdorff formula in a different manner.

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