47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
import pynam.dielectric
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import numpy as np
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import pytest
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from pynam.baskets import CalculationParams
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def get_common_lindhard_dielectric():
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params = CalculationParams(omega=1e9, omega_p=3.5e15, tau=1e-14, v_f=2e6)
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return pynam.dielectric.get_lindhard_dielectric(params)
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@pytest.mark.parametrize("test_input,expected", [
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(10, -1222.185185062794 + 1.2249999998777178e8j),
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(1000, 16924.14814718176 + 1.2250000020552777e8j),
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(1e8, 83.687499999706 + 0.00022417398943752126j)
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])
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def test_lindhard_dielectric(test_input, expected):
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eps_to_test = get_common_lindhard_dielectric()
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np.testing.assert_almost_equal(
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eps_to_test(test_input), expected,
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decimal=6, err_msg='b function is off'
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)
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@pytest.mark.parametrize("test_input,expected", [
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((100, 100), -883.3001542404703 + 1.2566370613549341e8j),
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((100, 1e5), 5.827225842825694e7 + 3.933446612656656e7j),
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((100, 1e10), 1.0084823001646925 + 2.0013975538629039e-10j),
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((100, 1e7), 8483.300121667038 + 0.6340397839154446)
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])
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def test_zeta_pi_lindhard_dielectric(zeta_p_i_epsilon, test_input, expected):
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u, y = test_input
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actual = zeta_p_i_epsilon(np.sqrt(u**2 + y**2))
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np.testing.assert_allclose(
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actual, expected,
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rtol=10**3.8, err_msg='lindhard dielectric differs from Mathematica'
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)
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@pytest.fixture
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def zeta_p_i_epsilon():
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params = CalculationParams(omega=1e9, omega_p=3.544907701811032e15, tau=1e-14, v_f=2e6)
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return pynam.dielectric.get_lindhard_dielectric(params)
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