povm_test.py 文件源码

def nopovm(request, local_dim, rgen):
    """Provide different POVMs and non-POVMs for testing

    We provide instances of :class:`povm.localpovm.POVM` with the
    following elements:

    * `pauli`: Generated by :func:`povm.pauli_povm()`

    * `random`: Random (non-Hermitian, non-positive) elements for
      testing. (These elements do not constitute a POVM. We use them
      to distinguish elem.conj() from elem.T in our code.)

    """
    nopovm_name = request.param
    if nopovm_name == 'pauli':
        return povm.pauli_povm(local_dim)
    elif nopovm_name == 'random':
        d = local_dim
        return povm.localpovm.POVM(factory._zrandn((2 * d**2, d, d), rgen))
    else:
        raise ValueError('Unknown fixture name {}'.format(nopovm_name))