Math & Science ⇒ operator in quantum mechanics

[mnemo]

Dear all,

I am writing several equations of quantum mechanics and I have managed to create commands for ket, bra, product and mean as follow:

Code: Select all

\newcommand{\mean}[1]{\lf\langle #1\ri\rangle}
\newcommand{\bra}[1]{\lf\langle #1|\ri.}
\newcommand{\ket}[1]{\lf. |#1\ri\rangle}
\newcommand{\product}[2]{\lf\langle #1 | #2 \ri\rangle}

and I want that the different operators adapt their size to the element #1 or #2. With my commands, the \langle and the \rangle are ok but I did not find any way to adapt automatically the size of the |
Do you have any idea how to do it.
I am sure that this problem has been already fixed by someone and I am sorry if my email is redundant with another one.

regards
mnemo

[Johannes_B]

Hi and welcome,

there is really no need to re-invent the wheel. Please have a look at package physics. It should do what you want.

[cgnieder]

Hi mnemo,

Do you know the braket package?

Regards