fix typo in eq 26

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Valentin Boettcher 2023-03-13 12:11:17 -04:00
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@ -409,7 +409,7 @@ defeat the point.
It is useful to express the above in terms of an effective Hamiltonian
\begin{equation}
\label{eq:26}
H_{\eff}[H](t)\equiv \frac{1}{-\iu t} \log[U_{t}[H]].
H_{\eff}[H](t)\equiv \frac{1}{-\iu t} \log[\mathcal{U}_{t}[H]].
\end{equation}
This Hamiltonian, similar to the Floquet Hamiltonian, has a spectrum
limited by the branch cut of the complex logarithm, which however has