def _kraus_to_other_single(self, rep, qubits_test_cases, repetitions): """Test single Kraus to Other evolution.""" for nq in qubits_test_cases: dim = 2**nq for _ in range(repetitions): rho = self.rand_rho(dim) kraus = self.rand_kraus(dim, dim, dim**2) chan1 = Kraus(kraus) rho1 = chan1._evolve(rho) chan2 = rep(chan1) rho2 = chan2._evolve(rho) self.assertAllClose(rho1, rho2)
def test_ptm_to_kraus(self): """Test PTM to Kraus transformation.""" # Test unitary channels for mat, ptm in zip(self.unitary_mat, self.unitary_ptm): chan1 = Kraus(mat) chan2 = Kraus(PTM(ptm)) self.assertTrue( matrix_equal(chan2.data[0], chan1.data[0], ignore_phase=True)) # Test depolarizing channels rho = np.diag([1, 0]) for p in [0.25, 0.5, 0.75, 1]: targ = Kraus(self.depol_kraus(p))._evolve(rho) chan = Kraus(PTM(self.depol_ptm(p))) self.assertAllClose(chan._evolve(rho), targ)