qubits

French research institute CEA-Leti and quantum computing startup Quobly have announced an expanded collaboration aimed at accelerating the development of next-generation silicon-based quantum technologies. The partnership builds on their existing work and focuses on advancing silicon qubit technology as a route toward scalable quantum computing. Details of the agreement, including financial terms and specific milestones, have not been disclosed in initial reports.

New research suggests breaking Bitcoin's cryptography could require as few as 1,151 logical qubits, roughly half the previously estimated cost of a quantum attack. The revised figure intensifies debate over how soon quantum computers could threaten Bitcoin's elliptic curve signatures and whether the network should migrate to quantum-resistant cryptography before it is too late.

Microsoft has offered its Majorana-based quantum chips to DARPA for independent evaluation, a move that would subject the company's contested topological qubit claims to outside scrutiny. The announcement drew attention in semiconductor and quantum computing circles, where experts have debated whether Microsoft's Majorana approach represents a genuine breakthrough or an unproven path. Independent testing by the US defense agency could lend credibility to, or undermine, the technology.

Sebastian Hassinger, host of The New Quantum Era podcast, argues that neutral-atom platforms currently hold the lead among quantum computing qubit technologies. He points to the approach's combination of scalability, long coherence times and flexible connectivity as reasons it is outpacing rival architectures such as superconducting and trapped-ion systems, at least for now.

Researchers have derived a new formula for the return probability of a qubit, a measure of how likely a quantum bit is to return to its initial state. The result, reported by Quantum Zeitgeist, is relevant to quantum computing specialists studying qubit dynamics and decoherence. Details of the research team, publication venue, and practical implications have not yet been widely reported.

Researchers have proposed a new definition for scalable logical qubits, the error-corrected building blocks needed for practical quantum computers. A clearer standard for what counts as a scalable logical qubit could help labs and companies measure progress toward fault-tolerant machines and compare results across different quantum computing platforms.

Hackaday is asking whether superconducting transistors could play a role in the future of quantum computing. The piece explores the idea of combining superconducting electronics with quantum hardware, a topic of interest as researchers seek faster, low-power control circuits for qubits. No specific breakthrough or named research group is cited in connection with the question.