From Spacetime at the Planck Scale: The Quantum Computer View, by Paola Zizzi:

"In our model, quantum spacetime is discrete, quantised in Planck units, and each pixel of Planckian area, encodes a qubit (qubitisation of quantum spacetime). This is a quantum memory register. To process the quantum information stored in the memory, it is necessary to dispose of a network of quantum logic gates (which are unitary operators). The network must be part of quantum spacetime itself, as it describes its dynamical evolution. The quantum memory plus the quantum network form a quantum computer."