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

TL;DR

This paper proposes a quantum network architecture using mid-infrared graphene plasmons to enable high-fidelity qubit operations and entanglement in silicon-based quantum systems, leveraging plasmon-enhanced light-matter interactions.

Contribution

It introduces a novel approach to quantum networking with graphene plasmons for silicon qubits, including methods for single-shot readout and two-qubit gates.

Findings

Single-shot spin readout via plasmon-enhanced interactions

High-fidelity two-qubit gates using graphene plasmons

Compatibility with existing silicon quantum technology

Abstract

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.