Overview

What is daqq?

daqq (Distributed Agreement on Quantum Queries) is a Cosmos SDK chain whose purpose is not to transfer value, but to give a P2P network of independent participants a way to cooperate on quantum-algorithm experiments without trusting any one party. Concretely, daqq lets nodes:

1. Agree on the same fresh random seed at the same block height, with no single point of trust.
2. Feed that seed into a quantum algorithm that every node runs identically.
3. Commit each node’s results back to a shared ledger so the whole network has an auditable, reproducible trail.

Why no rewards?

Most public blockchains pay block producers in a native token. daqq deliberately does not:

• The ledger is intended for collaborative scientific or experimental use, not for economic activity.
• Participation is its own reward — running a node means contributing to (and being able to verify) a shared randomness beacon and a shared archive of quantum-algorithm results.
• Removing the reward token simplifies the trust model: there is no MEV to extract, no fee market to design, no inflation schedule to argue about.

Why shared randomness?

Most interesting quantum algorithms (random-circuit sampling, variational ansatz training, randomized benchmarking, random Hamiltonian generation, …) take a random input somewhere. In a distributed setting, “use a random number” usually means each node picks its own — and they disagree, so nothing they produce is comparable.

For experiments that need every node to do the same randomized thing at the same logical moment, you need an agreed-upon random value.

Common bad options:

• Trust one node — single point of failure.
• Use the block hash — biasable by the proposer.
• Use timestamps — divergent across nodes, also biasable.

daqq’s beacon module uses a RANDAO-style commit-reveal scheme: every participant commits to a secret they choose, later reveals it, and the chain XORs all reveals together. As long as at least one honest participant picks an unpredictable secret, the resulting seed is unpredictable to everyone in advance.

What can you do with the seed?

Anything that benefits from “every node, same random input, same logical moment, results recorded for everyone to compare”. Some general patterns:

• Cross-validation of quantum hardware vs. simulator. Every node simulates / executes the same parameterised quantum algorithm and submits its outcome; divergences are immediately visible.
• Reproducible benchmarking. A canonical sequence of randomized instances, archived on-chain, that anyone can replay against new hardware or new software.
• Distributed scientific bookkeeping. Researchers running independent experiments can anchor each run to a beacon round, so the random input is provably not cherry-picked.

Many algorithms, one beacon

daqq is structured as a multi-problem platform: the problems module keeps an on-chain registry of every algorithm the network supports, and participants are free to pick any of them to run against each round’s shared seed. Adding a new algorithm means shipping a new Cosmos SDK module that consumes Seeds[roundID], computes its result, and writes to its own ledger. New modules are rolled out via gov upgrade. See Problem System for the full design.

Example: Problem #1, random_circuit

The chain ships with one concrete problem to make the platform tangible. The random_circuit module:

1. Takes the round’s seed.
2. Generates a random quantum circuit deterministically from it (parameterised by (seed, width, depth)).
3. Has every participant compute the circuit’s theoretical output probability distribution locally.
4. Records each participant’s distribution on-chain so divergences across nodes become visible.

random_circuit is just one example consumer of the beacon. Other algorithms — VQE on random Hamiltonians, randomized benchmarking sequences, random Clifford sampling, etc. — can be added as additional problem modules without touching the beacon or the existing ledger.