povm_test.py 文件源码

def test_mppovm_pmf_as_array_pmps(
        nr_sites, local_dim, rank, startsite, width, rgen):
    if hasattr(local_dim, '__len__'):
        pdims = [d for d, _ in local_dim]
        mppaulis = mp.chain(
            povm.MPPovm.from_local_povm(povm.pauli_povm(d), 1)
            for d in pdims[startsite:startsite + width]
        )
    else:
        pdims = local_dim
        local_dim = (local_dim, local_dim)
        mppaulis = povm.MPPovm.from_local_povm(povm.pauli_povm(pdims), width)
    mppaulis = mppaulis.embed(nr_sites, startsite, pdims)
    pmps = factory.random_mpa(nr_sites, local_dim, rank,
                              dtype=np.complex_, randstate=rgen, normalized=True)
    rho = mpsmpo.pmps_to_mpo(pmps)
    expect_rho = mppaulis.pmf_as_array(rho, 'mpdo')

    for impl in ['default', 'pmps-ltr', 'pmps-symm']:
        expect_pmps = mppaulis.pmf_as_array(pmps, 'pmps', impl=impl)
        assert_array_almost_equal(expect_rho, expect_pmps, err_msg=impl)