bra-ket notation notation, is used to denote quantum states. How to write bra-ket/braket notation in Latex with braket package: braket , bra and ket.

## Write default Latex bra-ket notation

To write to write bra-ket/braket notation or symbol, we must use bracket package:

which gives:

$\braket{\alpha|\beta}$ $\braket{\alpha||\beta}$ $\braket{\alpha|T|\beta}$

## Write default Latex bra notation

To write to write bra notation or symbol, we must use bracket package:

which gives:

$\bra{\alpha}$ $\bra \psi{(t)}$ $\bra {\gamma{(t)}}$

## Write default ket notation

To write to write ket notation or symbol, we must use bracket package:

which gives:

$\ket{\Psi}$ $\ket \psi{(t)}$ $\ket {\gamma{(t)}}$

## Example: bra ket notation for Schrödinger’s Equation

Schrodinger’s equation governs the time evolution of quantum states. It says that the time dependence of a state $\ket{\psi}$ is given by

$\hat H \ket{\psi} = i\hbar \frac{\partial{}}{\partial t} \ket{\psi}$

where $\hat H$ is the Hamiltonian of the system.