povm_test.py 文件源码

def _get_povm(name, nr_sites, local_dim, local_width):
    if name == 'global':
        return povm.pauli_mpps(local_width, local_dim).repeat(nr_sites)
    elif name == 'splitpauli':
        return povm.pauli_mpps(local_width, local_dim).block(nr_sites)
    elif name == 'pauli':
        return povm.pauli_mpp(local_width, local_dim).block(nr_sites)
    elif name == "all-y":
        return povm.MPPovmList([povm.MPPovm.from_local_povm(
            povm.pauli_parts(local_dim)[1], nr_sites)])
    elif name == "local-x":
        return povm.MPPovmList([
            povm.MPPovm.from_local_povm(
                povm.pauli_parts(local_dim)[0], local_width)
            .embed(nr_sites, 0, local_dim)
        ])
    else:
        raise ValueError('Unknown MP-POVM list {!r}'.format(name))