def test_determinant_to_ops_inorder(self):
"""If spin case is not necessary to distinguish in the representation
return the orbitals based on increasing index.
"""
test_ops = FermionOperator('0^ 1^ 2^ 3^ 4^', 1.0)
self.assertEqual(
openfermion_utils.determinant_to_ops(7, 3, inorder=True), test_ops)
def test_determinant_to_ops_beta(self):
"""A singly occupied determinant should just have a single creation
operator in it.
"""
self.assertEqual(openfermion_utils.determinant_to_ops(0, 1),
FermionOperator('1^', 1.0))
def test_determinant_to_ops(self):
"""Convert a determinant to openfermion ops
"""
test_ops = FermionOperator('0^ 2^ 4^ 1^ 3^', 1.0)
self.assertEqual(openfermion_utils.determinant_to_ops(7, 3), test_ops)
def test_determinant_to_ops_null(self):
"""A determinant with no occupation should return None type.
"""
self.assertEqual(openfermion_utils.determinant_to_ops(0, 0),
FermionOperator('', 1.0))