Deal adds key IP and expertise to scale toward millions of qubits via photonic interconnects and long-distance quantum repeaters
IonQ announced its intent to acquire Boston-based Lightsynq Technologies, a startup founded by quantum memory pioneers from Harvard and AWS. The acquisition is designed to fast-track IonQ’s quantum networking and computing ambitions, particularly in building scalable, modular systems using photonic interconnects and quantum repeaters. The Lightsynq team will join IonQ, bringing deep expertise and over 20 patents in quantum memory technologies.
Lightsynq’s architecture is expected to enhance IonQ’s efforts to build data-center-scale quantum computing infrastructure by enabling high-fidelity, multi-node qubit operations. The deal follows IonQ’s recent acquisitions of Qubitekk and ID Quantique, as well as government contracts with ARLIS and AFRL. IonQ sees the integration of Lightsynq’s photonic technologies as a foundational step toward building a scalable quantum internet.
- Lightsynq acquisition adds a team of Harvard/AWS quantum networking experts and 20+ quantum memory patents to IonQ
- Photonic interconnect platform expected to enable modular scaling and high-fidelity multi-node operations across distributed quantum systems
- Strategic goal: accelerate delivery of quantum systems with tens of thousands to millions of qubits
- Quantum repeater technology critical for long-distance entanglement and future quantum internet deployment
- Industry impact: supports use cases across finance, telecom, aerospace, and defense
- Follows prior deals: Qubitekk and ID Quantique acquisitions, and new development hub with EPB in Chattanooga
- CEO comment: “Lightsynq will help us scale both compute power and network reach,” said IonQ CEO Niccolo de Masi
- Lightsynq CEO quote: “Our interconnect is the key to unlocking a scalable quantum internet,” said Dr. Mihir Bhaskar
- Lightsynq Technologies, headquartered in Boston, Massachusetts, was founded in 2023 by quantum networking researchers Dr. Mihir Bhaskar, Dr. Bart Machielse, and Dr. David Levonian—former leaders at Harvard University’s quantum memory lab and the AWS Center for Quantum Networking. The team is credited with developing the world’s first memory-enhanced quantum repeater, demonstrated in a 2020 Nature paper, which extended quantum entanglement over long distances using silicon-vacancy (SiV) color centers in diamond photonic circuits. This breakthrough is a cornerstone for scalable quantum internet infrastructure, enabling applications like quantum cryptography and distributed quantum computing. Lightsynq’s core innovations focus on photonic interconnects that link distributed quantum processors with high fidelity, leveraging diamond-based photonic integrated circuits (PICs) for compatibility with diverse quantum hardware platforms (e.g., ions, atoms, photons). Their novel quantum memory systems, built around SiV color centers, support synchronized, fault-tolerant qubit operations across network nodes, incorporating features like heralded memory operation and in-memory Bell-state measurements.
- In November 2024, Lightsynq secured an $18 million Series A funding round led by Cerberus Ventures, with participation from deep tech investors including Murata Electronics North America, IAG Capital Partners, Safar Partners, QVT, Element Six, and In-Q-Tel. This funding supported the scaling of their quantum interconnect and repeater technologies, building on a long-standing collaboration with Element Six for diamond material development since 2015. Prior to its acquisition by IonQ on May 7, 2025, Lightsynq had amassed an intellectual property portfolio of over 20 patents and patent applications in quantum interconnects, memory, and repeater technologies. The acquisition, aimed at advancing IonQ’s roadmap toward million-qubit systems and quantum networking, integrated Lightsynq’s team and expertise into IonQ’s operations. Lightsynq’s technology, validated through a prototype quantum repeater node in 2020, offers significant potential for reducing signal loss in long-distance quantum networks and enabling foundry-scale production of quantum interconnects, positioning the company as a key player in the quantum communications ecosystem.