outer

outer(vector1, vector2=None)

Construct the outer product of two vectors.

The second vector argument is optional, if absent the projector of the first vector will be returned.

Parameters

• vector1 (ndarray) – the first vector.
• vector2 (ndarray) – the (optional) second vector.

Returns

The matrix $|v1\rangle\langle{v2}|$.

Return type

np.array