On July 8, 2025, a new frontier was crossed on Bittensor with the launch of Subnet 63 “Quantum”. Led by qBitTensor Labs, this ambitious project aims to democratize access to quantum computing through a decentralized, open, and incentivized architecture.
The goal? Accelerate applied research in quantum computing by leveraging Bittensor’s framework, bringing together simulators, experts, miners, and validators in a collaborative and meritocratic environment.
An Ambitious Vision: Making Quantum Accessible to All
Quantum is built on a strong conviction: quantum computing will revolutionize every sector—from finance to chemistry to cryptography. Yet today, this technology remains costly, unstable, and controlled by a handful of players.
qBitTensor Labs proposes a different path: an open network where anyone can contribute, test, validate, and monetize quantum circuits, whether through physical QPUs or simulators.
“We are building the infrastructure for a future where quantum power is a shared utility, not a privileged resource.”
Phase 1: Peaked Circuits, a Proof of Fidelity
Quantum starts with a unique class of problems: Peaked Circuits, based on a paper by Scott Aaronson & Yuxuan Zhang (arXiv:2404.14493).
The principle:
- A quantum circuit generates a concentrated output distribution around a target state.
- Miners must find the hidden bitstring, demonstrating accurate simulation of quantum coherence.
- This native verifiability makes the system perfectly suited to Bittensor’s decentralized environment.
This concept is detailed in the document “Technical Description of Peaked Circuits”, available on qBitTensor Labs’ official website:
Technical Objectives and Incentives
Validator/Miner Cycle
- Validators generate circuits (QASM format) with a known result.
- Miners execute those circuits and return their best guess at the hidden string.
- Validators evaluate results using a metric that combines circuit size and entanglement entropy.
Scoring Function
A miner’s score depends on two factors:
- Entanglement entropy (30%) — higher entanglement means greater difficulty.
- Circuit size (70%) — with a bonus beyond 32 qubits.
Scores decay exponentially over time (24-hour half-life), pushing miners to constantly improve.
Infrastructure and Compatibility
The codebase includes a default miner using Qiskit, but can be adapted to:
- AWS Braket, Google Cirq, Nvidia Cuda-Q, Quantum Rings, Blue Qubit…
- Or real QPUs, such as IBM Eagle, which successfully ran a 12-qubit circuit (with notable error: 34% in simulation → 7% on device).
Roadmap: Toward an Open Quantum Problem-Solving Platform
Quantum is rolling out in three phases:
Phase 1 — Verifiable Circuits
Starts with Peaked Circuits, followed by other tamper-proof, endlessly generable and verifiable benchmarks.
Phase 2 — Synthetic, Real-World-Oriented Problems
Circuits inspired by real use cases (finance, chemistry, cryptography…), still synthetic but increasingly specialized.
Phase 3 — Open Platform
A system where anyone can submit quantum problems to be executed and validated by the network. The goal: fully democratized distributed quantum computing.
Community Reception
Subnet 63’s launch saw strong community engagement, notably acknowledged by the founding team. On July 14, 2025, qBitTensor Labs posted on X:
“We’re shifting our focus to the next challenge: growing Quantum into a top-tier subnet.”
Even const, Bittensor co-founder, dropped by Quantum’s Discord with a now-famous meme—proof of the project’s visibility across the network.
A Discreet Team… with an Obvious Link
The team behind Quantum has not yet been doxxed, which is common at this stage on Bittensor. That said, there is an obvious link to the company Quantum Rings, known for its advanced quantum simulation tools.
Out of respect, we’ll wait for the team to reveal themselves officially. But the more curious among you won’t have much trouble uncovering some very promising leads…
Useful Links
- X account: @qBitTensor
- Website: qbittensorlabs.com
- GitHub: github.com/qbittensor-labs/quantum
- Medium
⚠️ Editor’s Note: This article was originally published by Punisher on X (formerly Twitter). It is republished here with full credit to the author. All rights belong to the original author.
Be the first to comment