IonQ, a quantum computing company, has announced a significant technical milestone in the development of photonic interconnects, a core technology that could enable quantum networking between and within quantum computers. This is reportedly the first demonstration of ion-photon entanglement outside of an academic environment. The company’s scaling strategy involves adding more qubits to newly designed traps and networking traps together via photonic interconnects. IonQ has successfully demonstrated the first milestone in this process, ion-photon entanglement, which is a major step forward in scaling their qubit counts.
Quantum Networking: IonQ’s Progress with Photonic Interconnects
IonQ, a company specializing in quantum computing, has recently announced a significant technical achievement in the field of photonic interconnects. This technology is considered a crucial component in the development of quantum networking, which involves the connection of multiple quantum computers. IonQ’s recent accomplishment marks the first instance of ion-photon entanglement being demonstrated outside of an academic setting.

Scaling Quantum Computing: IonQ’s Strategy
IonQ’s strategy for scaling quantum computing involves two primary areas of research and development: increasing the number of qubits in newly designed traps and networking these traps through photonic interconnects. Photonic interconnects allow for the entanglement of remote qubits across multiple physical locations. This technology is a key reason why IonQ has chosen to focus on ions for quantum computing, given their high fidelity, high connectivity, long coherence, and compatibility with photonic networking.
IonQ’s Path to Photonic Interconnects
IonQ’s approach to developing photonic interconnects involves four main milestones, each building upon the previous one. The first milestone, which IonQ has recently achieved, involves generating and manipulating single photons entangled with a qubit to form a network node. This node must be capable of generating “interconnect photons” entangled with the interconnect qubit, sending these photons through fiber optics to a detection hub, and allowing the detection hub to manipulate and measure the state of the interconnect photon to confirm ion-photon entanglement.
IonQ’s Future Milestones in Photonic Interconnects
The next milestones in IonQ’s roadmap involve expanding upon the first milestone by entangling two ion-based qubits from separate nodes using their entangled photons, transferring this entanglement from interconnect qubits to computation qubits for more complex algorithms, and scaling photonic interconnects beyond two nodes. The final goal is to network many quantum processing units (QPUs) together in a programmatic fashion, allowing for the execution of extremely wide circuits by harnessing all of the qubits in the network in parallel.
From Physics to Commercial Engineering: IonQ’s Journey
IonQ’s journey in developing photonic interconnect technology involves transitioning this technology from a lab setting to commercial grade. The company is leveraging existing academic research and the expertise of its specialists to efficiently transfer this technology from the academic world into a commercial trapped ion system. This integration of photonic interconnect technology with protocol development and advanced optical design is a cutting-edge frontier in the field of quantum computing.

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