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- 1Bitcoin Quantum Attack Estimate Halved to 1,151 Qubits▼Bitcoin Quantum Attack Cost Halved to 1,151 Qubits [2026]
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.
- 2New Quantum Codes Handle Qubit Loss and Gain●Quantum Codes Correct Errors Even With Qubit Loss Or Gain
Researchers have developed quantum error-correcting codes that remain effective even when qubits are lost or unexpectedly added to a system, according to a report by Quantum Zeitgeist. This addresses a key challenge in quantum computing, where hardware instability and fluctuating qubit counts can corrupt calculations. The codes could improve the reliability of future quantum machines.
- 3Microsoft opens Majorana quantum chips to DARPA testing▼Microsoft opens Majorana quantum chips to DARPA for independent testing
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.
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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.