triqs.atom_diag.atom_diag.quantum_number_eigenvalues_checked

triqs.atom_diag.atom_diag.quantum_number_eigenvalues_checked()

Dispatched C++ function(s).

[1] (op: Operator, atom: AtomDiagReal)
  -> [[float]]

[2] (op: Operator, atom: AtomDiagComplex)
  -> [[float]]

Tabulate the eigenvalues \(q_{B,i}\) of a quantum-number operator \(\hat Q\), also checking that the operator is diagonal in the eigenbasis.

Same as quantum_number_eigenvalues, but also verifies that the supplied operator is diagonal in the eigenbasis of the Hamiltonian. If it is not, an exception is raised. Useful when constructing a quantum number from scratch and one wants to confirm that it really is a conserved quantity of atom.

Parameters:

opOperator, Operator

Observable operator; expected to be a quantum number (otherwise an exception is raised).

atomAtomDiagReal, AtomDiagComplex

Solved diagonalization problem.

Returns:

[[float]]

Eigenvalues \(q_{B,i}\) grouped by invariant subspace \(B\).