StateFn.to_density_matrix

StateFn.to_density_matrix(massive=False)

Return matrix representing product of StateFn evaluated on pairs of basis states. Overridden by child classes.

Parameters

massive (bool) – Whether to allow large conversions, e.g. creating a matrix representing over 16 qubits.

Return type

ndarray

Returns

The NumPy array representing the density matrix of the State function.

Raises

ValueError – If massive is set to False, and exponentially large computation is needed.