def test_commutes_number_operators(self):
com = commutator(FermionOperator('4^ 3^ 4 3'), FermionOperator('2^ 2'))
com = normal_ordered(com)
self.assertEqual(com, FermionOperator.zero())
com = commutator(BosonOperator('4^ 3^ 4 3'), BosonOperator('2^ 2'))
com = normal_ordered(com)
self.assertTrue(com == BosonOperator.zero())
def test_commutes_identity(self):
com = commutator(FermionOperator.identity(),
FermionOperator('2^ 3', 2.3))
self.assertEqual(com, FermionOperator.zero())
com = commutator(BosonOperator.identity(), BosonOperator('2^ 3', 2.3))
self.assertTrue(com == BosonOperator.zero())
com = commutator(QuadOperator.identity(), QuadOperator('q2 p3', 2.3))
self.assertTrue(com == QuadOperator.zero())
def test_commutes_no_intersection(self):
com = commutator(FermionOperator('2^ 3'), FermionOperator('4^ 5^ 3'))
com = normal_ordered(com)
self.assertEqual(com, FermionOperator.zero())
com = commutator(BosonOperator('2^ 3'), BosonOperator('4^ 5^ 3'))
com = normal_ordered(com)
self.assertTrue(com == BosonOperator.zero())
com = commutator(QuadOperator('q2 p3'), QuadOperator('q4 q5 p3'))
com = normal_ordered(com)
self.assertTrue(com == QuadOperator.zero())
def test_zero(self):
q = QuadOperator()
b = get_boson_operator(q)
self.assertTrue(b == BosonOperator.zero())
