def test_number_operator_nosite(self):
op = number_operator(4, parity=-1)
expected = (FermionOperator(((0, 1), (0, 0))) + FermionOperator(
((1, 1), (1, 0))) + FermionOperator(
((2, 1), (2, 0))) + FermionOperator(((3, 1), (3, 0))))
self.assertEqual(op, expected)
op = number_operator(4, parity=1)
expected = (BosonOperator(((0, 1), (0, 0))) + BosonOperator(
((1, 1), (1, 0))) + BosonOperator(
((2, 1), (2, 0))) + BosonOperator(((3, 1), (3, 0))))
self.assertTrue(op == expected)
def test_number_operator_nosite(self):
op = number_operator(4)
expected = (FermionOperator(((0, 1), (0, 0))) +
FermionOperator(((1, 1), (1, 0))) +
FermionOperator(((2, 1), (2, 0))) +
FermionOperator(((3, 1), (3, 0))))
self.assertEqual(op, expected)
def test_number_operator_site(self):
op = number_operator(3, 2, 1j)
self.assertTrue(op == FermionOperator(((2, 1), (2, 0))) * 1j)
def test_fermion_number_operator_site(self):
op = number_operator(3, 2, 1j, -1)
self.assertEqual(op, FermionOperator(((2, 1), (2, 0))) * 1j)
op = number_operator(3, 2, 1j, 1)
self.assertTrue(op == BosonOperator(((2, 1), (2, 0))) * 1j)