Quantum computing
Coverage of quantum sensing, post-quantum cryptography and quantum computing programmes with defense applications.
Why this segment matters
Quantum technologies matter to defense through three distinct paths, and conflating them causes most of the confusion around the segment. Quantum sensing offers navigation without satellite signals — directly relevant given how effectively GPS is now jammed — and is the nearest-term application. Post-quantum cryptography addresses the risk that current encryption becomes breakable, driving migration programmes that are underway regardless of when capable machines arrive. Quantum computing itself, applied to optimisation or materials, remains the most distant.
The investment implication is that timelines differ by an order of magnitude across these three. Sensing prototypes are being field-tested; cryptographic migration is a live compliance requirement; general-purpose quantum computing remains a research programme with contested milestones and no consensus on when useful advantage arrives.
Coverage follows government research awards, sensing and navigation trials, cryptographic standards and migration mandates, and hardware milestone claims. Treat the last category with particular scepticism: many listed companies in this segment are pre-revenue or near it, several are capped by the financial gate in our scoring, and announcements are often calibrated to funding cycles rather than technical readiness. See our methodology for how tracked companies are scored.
Steve Hoffman Discusses Quantum Technology Adoption in U.S. Defense
Steve Hoffman of HELM Innovations emphasizes the necessity for the U.S. Department of Defense to accelerate the adoption and integration of quantum technologies into military operations through improved prototyping and policy cooperation.
Italy Courts IonQ as Rome Seeks Deeper U.S. Quantum Ties
The Italian government is engaging with IonQ and U.S. institutional partners to strengthen Italy's domestic quantum technology sector through increased investment and research cooperation.
Infleqtion and Cisco Collaborate on Quantum Networking Research
Infleqtion and Cisco are collaborating on research to connect and scale distributed quantum computing and sensing systems, focusing on networking architectures and optical transduction.
Chalmers Researchers Make Bosonic Quantum Operations More Than 1,000 Times Faster
Researchers at Chalmers University of Technology have developed a method using quantum lattice gates to accelerate bosonic quantum operations, which could support the development of more stable, fault-tolerant quantum computing.
Xanadu and AMD Launch Backline for Low-Latency Quantum-Classical Computing
Xanadu and AMD released 'Backline,' an open-source platform designed to facilitate low-latency communication between quantum and classical processors for applications like quantum error correction.
Altera and Riverlane Partner to Bring Quantum Error Correction Support to Agilex FPGAs
Altera and Riverlane have partnered to integrate Riverlane's quantum error correction interface with Altera's FPGAs, aimed at enhancing the performance and reliability of quantum hardware.
Researchers And AI Agents Cut Estimated Quantum Cost of Attacking Bitcoin Encryption by 86%
Researchers utilized human-AI collaboration to reduce the estimated quantum resources required to attack common blockchain encryption protocols, highlighting potential future cybersecurity risks.
Researchers And AI Agents Cut Estimated Quantum Cost of Attacking Bitcoin Encryption by 86%
Researchers and AI agents have developed a method to reduce the quantum computing resources required to attack Bitcoin and Ethereum encryption by 86%.
D-Wave, Rigetti, and Quantinuum Just Got $300 Million From Washington. Here's What That Changes for Investors.
The U.S. government has become a shareholder in Quantinuum, along with D-Wave and Rigetti, as part of a $300 million investment in quantum computing.
Rigetti Secures $100 Million CHIPS Award to Advance Quantum Scaling
Rigetti Computing secured a $100 million CHIPS Act award to support quantum scaling efforts including cryogenic capacity, readout electronics, and chip fabrication.
3 Quantum Stocks Just Scored $100 Million in Government Funding. Which Is the Best to Buy Now?
Rigetti, D-Wave, and Quantinuum have each secured $100 million in funding from the U.S. government.
D-Wave, Rigetti, and Quantinuum Just Got $300 Million From Washington. Here's What That Changes for Investors.
The U.S. government has become a shareholder in D-Wave along with other quantum computing firms, following a $300 million investment.
BWT Alpine Formula One Team and SEALSQ advance Formula One’s First Quantum Security Partnership with Hybrid Quantum-Classical Simulation
BWT Alpine Formula One Team and SEALSQ have expanded their partnership to incorporate quantum-powered computation and quantum-secure infrastructure into the team's engineering operations.
Italy Courts IonQ as Rome Seeks Deeper U.S. Quantum Ties
Italy is pursuing closer cooperation with IonQ to strengthen its own domestic quantum industry.
Why IonQ (IONQ) Stock Is Down Today
Mizuho Securities lowered its price target for IonQ following the company's Analyst Day, where it provided an updated 2026 revenue outlook.
IonQ’s CEO Says ‘Q-Day’ Hits in 2028. The Stock Says Investors Stopped Listening
IonQ's CEO identified 2028 as the year for 'Q-Day' when current encryption standards may be broken by quantum computing capabilities.
Infleqtion and Cisco Announce Collaboration to Advance Networked Quantum Technology
Infleqtion and Cisco have announced a collaboration to research and develop methods for connecting and scaling quantum systems into distributed networks.
Infleqtion and Cisco Collaborate on Quantum Networking Research
Infleqtion and Cisco are collaborating on research and development to connect and scale quantum systems into distributed networks.
Rising Losses Weigh on Rigetti's Outlook: Sell or Hold RGTI Stock Now?
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D-Wave, Rigetti and IonQ Stocks Rally on $100 Million Quantum Boost
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