A Quantum Network of Silicon Qubits using Mid-Infrared Graphene Plasmons

We consider a quantum network of mid-infrared, graphene plasmons coupled to
the hydrogen-like excited states of group-V donors in silicon. First, we show
how to use plasmon-enhanced light-matter interactions to achieve single-shot
spin readout of the donor qubits via optical excitation and electrical
detection of the emitted plasmons. We then show how plasmons in high mobility
graphene nanoribbons can be used to achieve high-fidelity, two-qubit gates and
entanglement of distant Si donor qubits. The proposed device is readily
compatible with existing technology and fabrication methods.