The Quantum Journal

SpinQ Technology, a Shenzhen-based provider of full-stack quantum solutions, has completed a 600 million Chinese Yuan ($87.2M USD) Series C+ financing round. This brings the company’s total Series C funding to nearly 1 billion Chinese Yuan ($145.3M USD) within the first quarter o…

Insider Brief The alarm over Google Quantum AI’s latest findings has centered on risk, but the same advance is sharpening the case that useful quantum applications may arrive sooner than expected. A recent white paper written by a Google-led research team outlined how a sufficien…

Diagram of a distance‑7 rotated surface code with 97 physical qubits (49 data qubits + 48 measurement qubits) modelled by the team. Grey nodes are data qubits; labeled circles are ancillas measuring X- or Z-type checks on neighboring data qubits. Edge colors encode the residual Z…

npj Quantum Information, Published online: 04 April 2026; doi:10.1038/s41534-026-01227-wContractive unitary and classical shadow tomography

Comparison of logical quantum resources (number of logical qubits and Toffoli gates) required to break 256-bit ECDLP for the secp256k1 curve, as reported by various prior works. Credit: Google Quantum AI whitepaper. By Mohamed Abdel-Kareem Recent technical disclosures from Google…

Insider Brief Quantum technology is often portrayed as a field staffed by people with doctoral degrees and years of academic experience. That may be how it is now, but experts are increasingly concerned that as quantum moves out of theory and into practice and out of the laborato…

Insider Brief PRESS RELEASE — SpinQ Technology, a leading global provider of full-stack quantum computing solutions, today announced the successful completion of its 600 million Chinese Yuan (about $83 million U.S.) Series C+ financing round. This milestone brings the compa…

Insider Brief A steady stream of announcements that quantum teams are making progress on quantum error correction seems to have stirred the once-skeptical cryptocurrency community. Coinbase CEO and co-founder Brian Armstrong said he will personally lead an industry push to make B…

Insider Brief PRESS RELEASE — QuEra Computing today open-sourced its T-gate simulator (Tsim), a GPU-accelerated quantum circuit simulator that, for the first time, lets researchers simulate non-Clifford gate operations at the speed and scale that quantum error correction (Q…

Insider Brief PRESS RELEASE — CavilinQ, a quantum hardware startup, today announced it has raised $8.8 million in seed funding to develop the interconnect hardware necessary to scale quantum computers beyond today’s single-processor limits. The round was led by QVT, with pa…

npj Quantum Information, Published online: 03 April 2026; doi:10.1038/s41534-026-01224-zDistributed quantum sensing with measurement-after-interaction strategies

CavilinQ, a Cambridge-based hardware startup, has closed an $8.8 million seed funding round led by QVT, with participation from Safar Partners, MFV Partners, Serendipity Capital, and Harper Court Ventures. The company is developing interconnect hardware designed to link multiple…

QuiX Quantum, in collaboration with NASA’s Quantum Artificial Intelligence Laboratory, the University of Twente, and Freie Universität Berlin, has demonstrated "below-threshold" error mitigation on a photonic quantum computer. The experiment, conducted on the QuiX Bia™ Cloud Quan…

Insider Brief In a week that has seen a parade of error-correction advances, a team of quantum computing researchers say they have shown a practical way to simulate large, error-prone quantum systems on classical computers, an advance that the scientists suggest could speed the p…

QuEra Computing has released Tsim, an open-source, GPU-accelerated quantum circuit simulator designed to model non-Clifford gate operations. The tool addresses a technical gap in the development of quantum error correction (QEC) protocols, which require high-speed, large-scale st…

Quanscient and Haiqu have announced a new quantum algorithm designed to accelerate Computational Fluid Dynamics (CFD) simulations. The researchers successfully executed a 15-step nonlinear fluid benchmark involving an obstacle, which currently stands as the most physically comple…

Insider Brief PRESS RELEASE — Large-scale quantum computers are waiting in the wings. One of the main reasons we don’t have them yet is because quantum hardware is so noisy. This isn’t the type of noise you’d want to shush in a crowded theater. When it comes to comput…

Insider Brief PRESS RELEASE — Infleqtion (NYSE: INFQ), a global leader in quantum sensing and quantum computing powered by neutral-atom technology, announced availability of the first quantum-enabled precision timing solution delivered as part of the company’s partnership w…

Insider Brief PRESS RELEASE —  QuiX Quantum, a leading provider of photonic quantum computing hardware, today announced it has demonstrated “below threshold” error mitigation for the first time on a photonic quantum computer, suppressing physical qubit errors to the le…

Scientists have unveiled a new approach to ultra-secure communication that could make quantum encryption simpler and more efficient than ever before. By harnessing a 19th-century optics phenomenon called the Talbot effect, researchers developed a system that sends information usi…

Quantum Computing Inc. (QCi) has installed its Dirac-3 quantum optimization machine at the Digital Crossroad Data Center in Hammond, Indiana. This deployment marks the first installation of the Dirac-3 in a commercial data center, where it is now integrated into the Quantum Corri…

EPB has joined the Southeastern Quantum Collaborative (SQC) as an inaugural member. Led by the University of Alabama in Huntsville (UAH), the SQC is a regional association of academic, industrial, and government organizations—including IBM, D-Wave, and IonQ—tasked with coordinati…

npj Quantum Information, Published online: 01 April 2026; doi:10.1038/s41534-026-01218-xQuantum cryptanalysis of SPN ciphers with known plaintext

Alice & Bob, in collaboration with Los Alamos National Laboratory and GE Vernova, has been awarded $3.9 million from the U.S. Department of Energy’s ARPA-E Quantum Computing for Computational Chemistry (QC3) program. The three-year project aims to develop fault-tolerant quant…

npj Quantum Information, Published online: 31 March 2026; doi:10.1038/s41534-026-01225-yFiber-integrated quantum frequency conversion for long-distance quantum networking

npj Quantum Information, Published online: 30 March 2026; doi:10.1038/s41534-026-01201-6Scalable conflict-free bandit algorithm using a quantum optical setup