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testJamiolkowski.py
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testJamiolkowski.py
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import unittest
import pygsti
import os
import numpy as np
from pygsti.construction import std1Q_XYI as std1Q
import pygsti.tools.basistools as bt
from pygsti.baseobjs import Basis
class JamiolkowskiTestCase(unittest.TestCase):
def setUp(self):
# move working directories
self.old = os.getcwd()
os.chdir(os.path.abspath(os.path.dirname(__file__)))
#Set Model objects to "strict" mode for testing
pygsti.objects.ExplicitOpModel._strict = True
# density matrix == 3x3 block diagonal matrix: a 2x2 block followed by a 1x1 block
self.stateSpaceDims = [(4,),(1,)]
self.std = pygsti.Basis.cast('std', 9)
self.gm = pygsti.Basis.cast('gm', 9)
self.stdSmall = pygsti.Basis.cast('std', [4, 1])
self.gmSmall = pygsti.Basis.cast('gm', [4, 1])
#labels which give a tensor product interp. for the states within each density matrix block
self.stateSpaceLabels = [('Qhappy',),('Lsad',)]
#Build a test gate -- old # X(pi,Qhappy)*LX(pi,0,2)
self.testGate = pygsti.construction.build_operation(self.stateSpaceDims, self.stateSpaceLabels, "LX(pi,0,2)", "std")
self.testGateGM_mx = bt.change_basis(self.testGate, self.stdSmall, self.gmSmall)
self.expTestGate_mx = bt.flexible_change_basis(self.testGate, self.stdSmall, self.std)
self.expTestGateGM_mx = bt.change_basis(self.expTestGate_mx, self.std, self.gm)
def tearDown(self):
os.chdir(self.old)
def checkBasis(self, cmb):
#Op with Jamio map on gate in std and gm bases
Jmx1 = pygsti.jamiolkowski_iso(self.testGate, opMxBasis=self.stdSmall,
choiMxBasis=cmb)
Jmx2 = pygsti.jamiolkowski_iso(self.testGateGM_mx, opMxBasis=self.gmSmall,
choiMxBasis=cmb)
print("Jmx1.shape = ",Jmx1.shape)
#Make sure these yield the same trace == 1 matrix
self.assertArraysAlmostEqual(Jmx1,Jmx2)
self.assertAlmostEqual(np.trace(Jmx1), 1.0)
#Op on expanded gate in std and gm bases
JmxExp1 = pygsti.jamiolkowski_iso(self.expTestGate_mx,opMxBasis=self.std,choiMxBasis=cmb)
JmxExp2 = pygsti.jamiolkowski_iso(self.expTestGateGM_mx,opMxBasis=self.gm,choiMxBasis=cmb)
print("JmxExp1.shape = ",JmxExp1.shape)
#Make sure these are the same as operating on the contracted basis
self.assertArraysAlmostEqual(Jmx1,JmxExp1)
self.assertArraysAlmostEqual(Jmx1,JmxExp2)
#Reverse transform should yield back the operation matrix
revTestGate_mx = pygsti.jamiolkowski_iso_inv(Jmx1,choiMxBasis=cmb,
opMxBasis=self.gmSmall)
self.assertArraysAlmostEqual(revTestGate_mx, self.testGateGM_mx)
#Reverse transform without specifying stateSpaceDims, then contraction, should yield same result
revExpTestGate_mx = pygsti.jamiolkowski_iso_inv(Jmx1,choiMxBasis=cmb,
opMxBasis=self.std)
self.assertArraysAlmostEqual( bt.resize_std_mx(revExpTestGate_mx, 'contract', self.std, self.stdSmall),
self.testGate)
def assertArraysAlmostEqual(self,a,b):
self.assertAlmostEqual( np.linalg.norm(a-b), 0 )
class TestJamiolkowskiMethods(JamiolkowskiTestCase):
def test_std_basis(self):
#mx_dim = sum([ int(np.sqrt(d)) for d in ])
cmb = Basis.cast('std', self.stateSpaceDims)
self.checkBasis(cmb)
def test_gm_basis(self):
#mx_dim = sum([ int(np.sqrt(d)) for d in self.stateSpaceDims])
cmb = Basis.cast('gm', self.stateSpaceDims)
self.checkBasis(cmb)
def test_jamiolkowski_ops(self):
gm = Basis.cast('gm', 4)
pp = Basis.cast('pp', 4)
std = Basis.cast('std', 4)
mxGM = np.array([[1, 0, 0, 0],
[0, 0, 1, 0],
[0,-1, 0, 0],
[0, 0, 0, 1]], 'complex')
mxStd = bt.change_basis(mxGM, gm, std)
mxPP = bt.change_basis(mxGM, gm, pp)
choiStd = pygsti.jamiolkowski_iso(mxStd, std, std)
choiStd2 = pygsti.jamiolkowski_iso(mxGM, gm, std)
choiStd3 = pygsti.jamiolkowski_iso(mxPP, pp, std)
fastChoiStd = pygsti.fast_jamiolkowski_iso_std(mxStd, std)
fastChoiStd2 = pygsti.fast_jamiolkowski_iso_std(mxGM, gm)
fastChoiStd3 = pygsti.fast_jamiolkowski_iso_std(mxPP, pp)
choiGM = pygsti.jamiolkowski_iso(mxStd, std,gm)
choiGM2 = pygsti.jamiolkowski_iso(mxGM, gm, gm)
choiGM3 = pygsti.jamiolkowski_iso(mxPP, pp, gm)
choiPP = pygsti.jamiolkowski_iso(mxStd, std, pp)
choiPP2 = pygsti.jamiolkowski_iso(mxGM, gm, pp)
choiPP3 = pygsti.jamiolkowski_iso(mxPP, pp, pp)
self.assertArraysAlmostEqual( choiStd, choiStd2)
self.assertArraysAlmostEqual( choiStd, choiStd3)
self.assertArraysAlmostEqual( choiStd, fastChoiStd)
self.assertArraysAlmostEqual( choiStd, fastChoiStd2)
self.assertArraysAlmostEqual( choiStd, fastChoiStd3)
self.assertArraysAlmostEqual( choiGM, choiGM2)
self.assertArraysAlmostEqual( choiGM, choiGM3)
self.assertArraysAlmostEqual( choiPP, choiPP2)
self.assertArraysAlmostEqual( choiPP, choiPP3)
gateStd = pygsti.jamiolkowski_iso_inv(choiStd, std,std)
gateStd2 = pygsti.jamiolkowski_iso_inv(choiGM, gm,std)
gateStd3 = pygsti.jamiolkowski_iso_inv(choiPP, pp,std)
gateGM = pygsti.jamiolkowski_iso_inv(choiStd, std,gm)
gateGM2 = pygsti.jamiolkowski_iso_inv(choiGM, gm,gm)
gateGM3 = pygsti.jamiolkowski_iso_inv(choiPP, pp,gm)
gatePP = pygsti.jamiolkowski_iso_inv(choiStd, std,pp)
gatePP2 = pygsti.jamiolkowski_iso_inv(choiGM, gm,pp)
gatePP3 = pygsti.jamiolkowski_iso_inv(choiPP, pp,pp)
fastGateStd = pygsti.fast_jamiolkowski_iso_std_inv(choiStd, std)
fastGateGM = pygsti.fast_jamiolkowski_iso_std_inv(choiStd, gm)
fastGatePP = pygsti.fast_jamiolkowski_iso_std_inv(choiStd, pp)
self.assertArraysAlmostEqual(gateStd, mxStd)
self.assertArraysAlmostEqual(gateStd2, mxStd)
self.assertArraysAlmostEqual(gateStd3, mxStd)
self.assertArraysAlmostEqual(fastGateStd, mxStd)
self.assertArraysAlmostEqual(gateGM, mxGM)
self.assertArraysAlmostEqual(gateGM2, mxGM)
self.assertArraysAlmostEqual(gateGM3, mxGM)
self.assertArraysAlmostEqual(fastGateGM, mxGM)
self.assertArraysAlmostEqual(gatePP, mxPP)
self.assertArraysAlmostEqual(gatePP2, mxPP)
self.assertArraysAlmostEqual(gatePP3, mxPP)
self.assertArraysAlmostEqual(fastGatePP, mxPP)
'''
with self.assertRaises(NotImplementedError):
pygsti.jamiolkowski_iso(mxStd, "foobar", gm) #invalid gate basis
with self.assertRaises(NotImplementedError):
pygsti.jamiolkowski_iso(mxStd, std, "foobar") #invalid choi basis
with self.assertRaises(NotImplementedError):
pygsti.jamiolkowski_iso_inv(choiStd, "foobar", gm) #invalid choi basis
with self.assertRaises(NotImplementedError):
pygsti.jamiolkowski_iso_inv(choiStd, std, "foobar") #invalid gate basis
'''
sumOfNeg = pygsti.sum_of_negative_choi_evals(std1Q.target_model())
sumOfNegWt= pygsti.sum_of_negative_choi_evals(std1Q.target_model(), {'Gx': 1.0, 'Gy': 0.5} )
sumsOfNeg = pygsti.sums_of_negative_choi_evals(std1Q.target_model())
magsOfNeg = pygsti.mags_of_negative_choi_evals(std1Q.target_model())
self.assertAlmostEqual(sumOfNeg, 0.0)
self.assertArraysAlmostEqual(sumsOfNeg, np.zeros(3,'d')) # 3 gates in std.target_model()
self.assertArraysAlmostEqual(magsOfNeg, np.zeros(12,'d')) # 3 gates * 4 evals each = 12
if __name__ == "__main__":
unittest.main(verbosity=2)