DensityMatrix.from_int

static DensityMatrix.from_int(i, dims)

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

Additional Information:

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.