def test_poschl_teller_eigen_energy_float_lambda(self, level, lam,
expected_energy):
# NOTE(leeley): I calculated some eigen energy for float lambda by the
# expression in Phys. Rev. B 95, 115115
self.assertAlmostEqual(
single_electron.poschl_teller_eigen_energy(level, lam),
expected_energy)
def test_poschl_teller_eigen_energy_int_lambda(
self, level, lam, expected_energy):
# For integer value of lambda, the eigen energy is
# E = -\mu^2 / 2
# \mu = \lambda, \lambda - 1, ..., 1
# https://en.wikipedia.org/wiki/P%C3%B6schl%E2%80%93Teller_potential
self.assertAlmostEqual(
single_electron.poschl_teller_eigen_energy(level, lam), expected_energy)