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How to write Latex symbol Latex Planck constant h, Planck constant reduced: \hbar, \hslash
The reduced Planck constant, often denoted \hbar, is an important physical constant in quantum mechanics and particle physics. It is defined as the Planck constant divided by 2π:
\begin{equation*}
\hbar = \frac{h}{2\pi}
\end{equation*}
where h is the Planck constant.
The \hbar command in LaTeX produces the symbol for the reduced Planck constant:
\hbar
This produces:
$$ \begin{equation*} \hbar = \frac{h}{2\pi} \end{equation*} $$
The \hslash command in LaTeX also produces the symbol for the reduced Planck constant:
\hslash
This produces:
$$ \begin{equation*} \hslash = \frac{h}{2\pi} \end{equation*} $$
Both commands produce the same symbol, but some authors prefer to use one or the other depending on the context.