qiskit/quantum_info/operators/channel/transformations.py
def _to_choi(rep, data, input_dim, output_dim):
    """Transform a QuantumChannel to the Choi representation."""
    if rep == 'Choi':
        return data
    if rep == 'Operator':
        return _from_operator('Choi', data, input_dim, output_dim)
    if rep == 'SuperOp':
        return _superop_to_choi(data, input_dim, output_dim)
    if rep == 'Kraus':
        return _kraus_to_choi(data, input_dim, output_dim)
    if rep == 'Chi':
        return _chi_to_choi(data, input_dim, output_dim)
    if rep == 'PTM':
        data = _ptm_to_superop(data, input_dim, output_dim)
        return _superop_to_choi(data, input_dim, output_dim)
    if rep == 'Stinespring':
        return _stinespring_to_choi(data, input_dim, output_dim)
    raise QiskitError('Invalid QuantumChannel {}'.format(rep))
def _to_choi(rep, data, input_dim, output_dim):
    if rep == 'Choi':
        return data
    if rep == 'Operator':
        return _from_operator('Choi', data, input_dim, output_dim)
    if rep == 'SuperOp':
        return _superop_to_choi(data, input_dim, output_dim)
    if rep == 'Kraus':
        return _kraus_to_choi(data, input_dim, output_dim)
    if rep == 'Chi':
        return _chi_to_choi(data, input_dim, output_dim)
    if rep == 'PTM':
        data = _ptm_to_superop(data, input_dim, output_dim)
        return _superop_to_choi(data, input_dim, output_dim)
    if rep == 'Stinespring':
        return _stinespring_to_choi(data, input_dim, output_dim)
    raise QiskitError('Invalid QuantumChannel {}'.format(rep))
def _to_choi ( rep , data , input_dim , output_dim ) : if rep == 'Choi' : return data if rep == 'Operator' : return _from_operator ( 'Choi' , data , input_dim , output_dim ) if rep == 'SuperOp' : return _superop_to_choi ( data , input_dim , output_dim ) if rep == 'Kraus' : return _kraus_to_choi ( data , input_dim , output_dim ) if rep == 'Chi' : return _chi_to_choi ( data , input_dim , output_dim ) if rep == 'PTM' : data = _ptm_to_superop ( data , input_dim , output_dim ) return _superop_to_choi ( data , input_dim , output_dim ) if rep == 'Stinespring' : return _stinespring_to_choi ( data , input_dim , output_dim ) raise QiskitError ( 'Invalid QuantumChannel {}' . format ( rep ) )
Transform a QuantumChannel to the Choi representation.
Transform a QuantumChannel to the Choi representation .