# qiskit.quantum_info.DensityMatrix.from_int¶

static DensityMatrix.from_int(i, dims)[source]

Return a computational basis state density matrix.

Parameters
• i (int) -- the basis state element.

• dims (int or tuple or list) -- The subsystem dimensions of the statevector (See additional information).

Returns

The computational basis state $$|i\rangle\!\langle i|$$.

Return type

DensityMatrix

The dims kwarg can be an integer or an iterable of integers.
• Iterable -- the subsystem dimensions are the values in the list with the total number of subsystems given by the length of the list.
• Int -- the integer specifies the total dimension of the state. If it is a power of two the state will be initialized as an N-qubit state. If it is not a power of two the state will have a single d-dimensional subsystem.