Some non-algebraic forms of $\exp (A+B)$

M. A. Tapia-Valerdi, I. Ramos-Prieto, F. Soto-Eguibar +1

We present examples where expressions for $\exp (\hat{A}+\hat{B})$ can be derived even though the operators (or superoperators) $\hat{A}$ and $\hat{B}$ do not commute in a manner th…