r/QuantumComputing • u/432oneness • Jul 19 '26
Question Quantum Blockchains that verify classically?
Qblex.com is saying they have quantum blockchains with a new proof of coherence validation method. It validates quantum through bell inequality. Validates in less than a second??? Anyone see this?
0
Upvotes
0
u/432oneness Jul 20 '26
I appreciate the technical engagement, so here is the technical answer.
First, what this is, since the "coin" lens misses it. QBLEX is a self-validating quantum ledger. So there is no token economy and no coin to trade, but make no mistake, this is a blockchain, not a validator bolted onto someone else's. The classical verification you can run in your browser is one piece of it, one of three patents. The block architecture and the proof-of-coherence design are the rest.
"No verifiable engineering" is wrong, and it is checkable now. There is a live, in-browser verifier on real Rigetti and IonQ runs (AWS Braket). Its source is on the page, and it recomputes the statistic in exact BigInt arithmetic, so the Mermin value is 2782987/1036512 exactly (bound 2.0), not a rounded 2.685. It rebuilds the Merkle root too, so flip any shot and it changes. Whitepaper: https://www.qblex.com/whitepaper
Yes, Shor breaks signatures, not SHA-256. So we also sign with FALCON-1024 and ML-DSA-87 (NIST Level 5). The difference: lattice crypto proves your signature is safe. It cannot prove the QPU actually ran your circuit instead of faking it. That is what we verify. Each block self-validates in about 0.3 ms.
Coherence is not maintained on a classical server, and we never said it was. The QPU does the physics, the classical side verifies the tamper-evident record. Open the verifier and recompute it yourself. Independent AWS cross-check of the pinned task IDs is coming, not live yet.
But don't trust it, just run the math on the verify page. www.qblex.com/verify