def test_switch_backend1(): c = Circuit().x[0].h[0] assert np.array_equal(c.run(), c.run(backend="numpy")) BlueqatGlobalSetting.set_default_backend("qasm_output") assert c.run() == c.to_qasm() # Different instance of QasmOutputBackend is used. # Lhs is owned by Circuit, rhs is passed as argument. But in this case same result. from blueqat.backends.qasm_output_backend import QasmOutputBackend assert c.run(output_prologue=False) == c.run(False, backend=QasmOutputBackend()) BlueqatGlobalSetting.set_default_backend("numpy") assert c.run(shots=5) == c.run_with_numpy(shots=5)
:returns Vqe object """ sampler = sampler or vqe.non_sampling_sampler minimizer = minimizer or vqe.get_scipy_minimizer( method="Powell", options={"ftol": 5.0e-2, "xtol": 5.0e-2, "maxiter": 1000, "disp": True} ) hamiltonian = pauli.I() * 0 for i, j in edges: hamiltonian += pauli.Z(i) * pauli.Z(j) return vqe.Vqe(vqe.QaoaAnsatz(hamiltonian, n_step), minimizer, sampler) if __name__ == "__main__": print("Input token:") token = input().strip() BlueqatGlobalSetting.set_default_backend("mqc") #sampler = vqe.get_measurement_sampler(1024) sampler = vqe.get_measurement_sampler(1024, {"token": token}) runner = maxcut_qaoa(2, [(0, 1), (1, 2), (2, 3), (3, 0), (1, 3), (0, 2), (4, 0), (4, 3)], sampler=sampler) result = runner.run(verbose=True) print(""" {4} / \\ {0}---{3} | x | {1}---{2} """.format(*result.most_common()[0][0]))