Marp on vscode など, physics パッケージが使えない mathjax で physcis のコマンドが使いたいとき用 (参考)
\def\quantity#1{\left\{ #1 \right\}}
\def\qty#1{\left\{ #1 \right\}}
\def\pqty#1{\left( #1 \right)}
\def\bqty#1{\left[ #1 \right]}
\def\vqty#1{\left\vert #1 \right\vert}
\def\Bqty#1{\left\{ #1 \right\}}
\def\absolutevalue#1{\left\vert #1 \right\vert}
\def\abs#1{\left\vert #1 \right\vert}
\def\norm#1{\left\Vert #1 \right\Vert}
\def\evaluated#1{ #1 \vert}
\def\eval#1{ #1 \vert}
\def\order#1{\mathcal{O} \left( #1 \right)}
\def\commutator#1#2{\left[ #1 , #2 \right]}
\def\comm#1#2{\left[ #1 , #2 \right]}
\def\anticommutator#1#2{\left\{ #1 , #2 \right\}}
\def\acomm#1#2{\left\{ #1 , #2 \right\}}
\def\poissonbracket#1#2{\left\{ #1 , #2 \right\}}
\def\pb#1#2{\left\{ #1 , #2 \right\}}
\def\vectorbold#1{\boldsymbol{ #1 }}
\def\vb#1{\boldsymbol{ #1 }}
\def\vectorarrow#1{\vec{\boldsymbol{ #1 }}}
\def\va#1{\vec{\boldsymbol{ #1 }}}
\def\vectorunit#1{{\boldsymbol{\hat{ #1 }}}}
\def\vu#1{{\boldsymbol{\hat{ #1 }}}}
\def\dotproduct{\boldsymbol\cdot}
\def\vdot{\boldsymbol\cdot}
\def\crossproduct{\boldsymbol\times}
\def\cross{\boldsymbol\times}
\def\cp{\boldsymbol\times}
\def\gradient{\boldsymbol\nabla}
\def\grad{\boldsymbol\nabla}
\def\divergence{\grad\vdot}
\def\div{\grad\vdot}
\def\curl{\grad\cross}
\def\laplacian{\nabla^2 }
\def\tr{\operatorname{tr}}
\def\Tr{\operatorname{Tr}}
\def\rank{\operatorname{rank}}
\def\erf{\operatorname{erf}}
\def\Res{\operatorname{Res}}
\def\principalvalue{\mathcal{P}}
\def\pv{\mathcal{P}}
\def\PV{\operatorname{P.V.}}
\def\Re#1{\operatorname{Re} \left\{ #1 \right\}}
\def\Im#1{\operatorname{Im} \left\{ #1 \right\}}
\def\qqtext#1{\quad\text{ #1 }\quad}
\def\qq#1{\quad\text{ #1 }\quad}
\def\qcomma{\text{,}\quad}
\def\qc{\text{,}\quad}
\def\qcc{\quad\text{c.c.}\quad}
\def\qif{\quad\text{if}\quad}
\def\qthen{\quad\text{then}\quad}
\def\qelse{\quad\text{else}\quad}
\def\qotherwise{\quad\text{otherwise}\quad}
\def\qunless{\quad\text{unless}\quad}
\def\qgiven{\quad\text{given}\quad}
\def\qusing{\quad\text{using}\quad}
\def\qassume{\quad\text{assume}\quad}
\def\qsince{\quad\text{since}\quad}
\def\qlet{\quad\text{let}\quad}
\def\qfor{\quad\text{for}\quad}
\def\qall{\quad\text{all}\quad}
\def\qeven{\quad\text{even}\quad}
\def\qodd{\quad\text{odd}\quad}
\def\qinteger{\quad\text{integer}\quad}
\def\qand{\quad\text{and}\quad}
\def\qor{\quad\text{or}\quad}
\def\qas{\quad\text{as}\quad}
\def\qin{\quad\text{in}\quad}
\def\differential{\text{d}}
\def\dd{\text{d}}
\def\derivative#1#2{\frac{\text{d}{ #1 }}{\text{d}{ #2 }}}
\def\dv#1#2{\frac{\text{d}{ #1 }}{\text{d}{ #2 }}}
\def\partialderivative#1#2{\frac{\partial{ #1 }}{\partial{ #2 }}}
\def\pdv#1#2{\frac{\partial{ #1 }}{\partial{ #2 }}}
\def\variation{\delta}
\def\var{\delta}
\def\functionalderivative#1#2{\frac{\delta{ #1 }}{\delta{ #2 }}}
\def\fdv#1#2{\frac{\delta{ #1 }}{\delta{ #2 }}}
\def\ket#1#2{\left\vert { #1 } \right\rangle}
\def\bra#1#2{\left\langle { #1 } \right\vert}
\def\innerproduct#1#2{\left\langle { #1 } \mid { #2 } \right\rangle}
\def\braket#1#2{\left\langle { #1 } \mid { #2 } \right\rangle}
\def\outerproduct#1#2{\left\vert { #1 } \right\rangle\left\langle { #2 } \right\vert}
\def\dyad#1#2{\left\vert { #1 } \right\rangle\left\langle { #2 } \right\vert}
\def\ketbra#1#2{\left\vert { #1 } \right\rangle\left\langle { #2 } \right\vert}
\def\op#1#2{\left\vert { #1 } \right\rangle\left\langle { #2 } \right\vert}
\def\expectationvalue#1{\left\langle { #1 } \right\rangle}
\def\expval#1{\left\langle { #1 } \right\rangle}
\def\ev#1{\left\langle { #1 } \right\rangle}
\def\matrixelement#1#2#3{\left\langle{ #1 }\right\vert{ #2 }\left\vert{ #3 }\right\rangle}
\def\matrixel#1#2#3{\left\langle{ #1 }\right\vert{ #2 }\left\vert{ #3 }\right\rangle}
\def\mel#1#2#3{\left\langle{ #1 }\right\vert{ #2 }\left\vert{ #3 }\right\rangle}\def\~#1{\tilde{#1}}おまけ
\def\bm#1{\boldsymbol{#1}}
\def\^#1{\hat{#1}}
\def\=#1{\overline{#1}}
\def\.#1{\dot{#1}}
\def\"#1{\ddot{#1}}
\def\/#1{\displaystyle{\not} #1}