def test_diffusion(self):
model = sycomore.como.Model(
sycomore.Species(0 * Hz, 0 * Hz, 1 * um * um / ms),
sycomore.Magnetization(0, 0, 1),
[["foo", sycomore.TimeInterval(500 * ms, 0.1 * rad / um)]])
model.apply_pulse(sycomore.Pulse(40 * deg, 0 * deg))
model.apply_time_interval("foo")
grid = model.magnetization()
for index, _ in sycomore.GridScanner(grid.origin(), grid.shape()):
if index == sycomore.Index(-1):
self.assertEqual(grid[index].p, 0)
self.assertEqual(grid[index].z, 0)
self.assertAlmostEqual(grid[index].m, 0 + 0.003062528150606j)
elif index == sycomore.Index(0):
self.assertEqual(grid[index].p, 0)
self.assertAlmostEqual(grid[index].z, 0.766044443118978)
self.assertEqual(grid[index].m, 0)
elif index == sycomore.Index(1):
self.assertAlmostEqual(grid[index].p, 0 - 0.003062528150606j)
self.assertEqual(grid[index].z, 0)
self.assertEqual(grid[index].m, 0)
else:
self.assertEqual(grid[index].p, 0)
self.assertAlmostEqual(grid[index].z, 0)
self.assertAlmostEqual(grid[index].m, 0)
def test_accessor(self):
grid = sycomore.Grid[complex](sycomore.Index(-5, -3),
sycomore.Shape(11, 7), 0)
grid[sycomore.Index(-2, -1)] = 1 + 2j
for index, offset in sycomore.GridScanner(grid.origin(), grid.shape()):
self.assertEqual(grid[index],
1 + 2j if index == sycomore.Index(-2, -1) else 0)
def test_scan_order(self):
grid = sycomore.Grid[complex](sycomore.Index(-5, -3),
sycomore.Shape(11, 7), 0)
i = 0
for index, _ in sycomore.GridScanner(grid.origin(), grid.shape()):
grid[index] = i
i += 1
i = 0
for x in grid:
self.assertEqual(x, i)
i += 1
def test_without_region(self):
scanner = sycomore.GridScanner(
sycomore.Index(-3, -5, -7), sycomore.Shape(7, 11, 15))
data = range(7*11*15)
iterator = iter(scanner)
for z in range(-7, 8):
for y in range(-5, 6):
for x in range(-3, 4):
index, offset = next(iterator)
self.assertSequenceEqual(index, [x,y,z])
self.assertEqual(offset, data[offset])
with self.assertRaises(StopIteration):
next(iterator)
def test_pulse(self):
model = sycomore.como.Model(
sycomore.Species(1 * s, 0.1 * s), sycomore.Magnetization(0, 0, 1),
[["dummy", sycomore.TimeInterval(0 * s)]])
model.apply_pulse(sycomore.Pulse(41 * deg, 27 * deg))
grid = model.magnetization()
for index, _ in sycomore.GridScanner(grid.origin(), grid.shape()):
if index == sycomore.Index(0):
self.assertAlmostEqual(grid[index].p,
0.210607912662250 - 0.413341301933443j)
self.assertAlmostEqual(grid[index].z, 0.754709580222772)
self.assertAlmostEqual(grid[index].m,
0.210607912662250 + 0.413341301933443j)
else:
self.assertEqual(grid[index].p, 0)
self.assertAlmostEqual(grid[index].z, 0)
self.assertAlmostEqual(grid[index].m, 0)
def test_time_interval(self):
model = sycomore.como.Model(
sycomore.Species(math.log(2) * Hz,
math.log(2) * Hz),
sycomore.Magnetization(0, 0, 1),
[["foo", sycomore.TimeInterval(1 * s)],
["bar", sycomore.TimeInterval(1 * s)]])
model.apply_pulse(sycomore.Pulse(45 * deg, 90 * deg))
model.apply_time_interval("foo")
grid = model.magnetization()
for index, _ in sycomore.GridScanner(grid.origin(), grid.shape()):
if index == sycomore.Index(-1, 0):
self.assertEqual(grid[index].p, 0)
self.assertEqual(grid[index].z, 0)
self.assertAlmostEqual(grid[index].m, 0.25)
elif index == sycomore.Index(0, 0):
self.assertEqual(grid[index].p, 0)
self.assertEqual(grid[index].z, 0.5 * (1 + math.sqrt(2) / 2))
self.assertEqual(grid[index].m, 0)
elif index == sycomore.Index(1, 0):
self.assertAlmostEqual(grid[index].p, 0.25)
self.assertEqual(grid[index].z, 0)
self.assertEqual(grid[index].m, 0)
else:
self.assertEqual(grid[index].p, 0)
self.assertAlmostEqual(grid[index].z, 0)
self.assertAlmostEqual(grid[index].m, 0)
model.apply_time_interval("bar")
grid = model.magnetization()
for index, _ in sycomore.GridScanner(grid.origin(), grid.shape()):
if index == sycomore.Index(-1, -1):
self.assertEqual(grid[index].p, 0)
self.assertEqual(grid[index].z, 0)
self.assertAlmostEqual(grid[index].m, 0.125)
elif index == sycomore.Index(0, 0):
self.assertEqual(grid[index].p, 0)
self.assertEqual(grid[index].z,
0.5 + 0.25 * (1 + math.sqrt(2) / 2))
self.assertEqual(grid[index].m, 0)
elif index == sycomore.Index(1, 1):
self.assertAlmostEqual(grid[index].p, 0.125)
self.assertEqual(grid[index].z, 0)
self.assertEqual(grid[index].m, 0)
else:
self.assertEqual(grid[index].p, 0)
self.assertAlmostEqual(grid[index].z, 0)
self.assertAlmostEqual(grid[index].m, 0)
isochromat = model.isochromat()
self.assertAlmostEqual(isochromat[0], 0.125 * math.sqrt(2))
self.assertAlmostEqual(isochromat[1], 0)
self.assertAlmostEqual(isochromat[2],
0.5 + 0.25 * (1 + math.sqrt(2) / 2))
isochromat = model.isochromat(
{sycomore.Index(0, 0),
sycomore.Index(-1, -1)})
self.assertAlmostEqual(isochromat[0], 0.125 * math.sqrt(2) / 2)
self.assertAlmostEqual(isochromat[1], 0)
self.assertAlmostEqual(isochromat[2],
0.5 + 0.25 * (1 + math.sqrt(2) / 2))