pygsti.tools.matrixtools.is_valid_density_mx

is_valid_density_mx(mx, tol=1e-09)

Test whether mx is a valid density matrix (hermitian, positive-definite, and unit trace).

Parameters:

• mx (numpy array) – Matrix to test.

• tol (float, optional) – Tolerance on absolute magitude of elements.

Returns:

True if mx is a valid density matrix, otherwise False.

Return type:

bool