  Qubits have been designed in the framework of quantum mechanics. Attempts to
formulate the problem in the language of quantum field theory have been
proposed already. In this short note we refine the meaning of qubits within the
framework of quantum field theory. We show that the notion of gauge invariance
naturally leads to a generalization of qubits to QFTbits which are then the
fundamental carriers of information from the quantum field theoretical point of
view. The goal of this note is to stress the availability of such a generalized
concept of QFTbits.
