The stories
behind the builds.
Project write-ups from the people who made them, guides to get you started,
and the latest from the community.
Browse by theme
A snapshot of what people are building, from music and art to tools and markets.
Quantum & Qollab
Research notes and opinions on quantum, plus announcements from the Qollab team.
Qollab x IonQ Hackathon 2026: global winners
Quantrain, SABRE-Q and Optogenetic Quantum Brain take 1st, 2nd and 3rd place.
Qollab x IonQ Hackathon 2026: global specialty awards
The best project in each theme, the most novel, the most impact and the best documentation.
Qollab x IonQ Hackathon 2026: local winners
The winning projects at 22 local nodes.
Quantum cloud computing services, compared
Which quantum computers you can reach on Amazon Braket, Azure, IBM and the makers’ own clouds, where hardware time is free, and how to send a first job.
Every project from the Qollab x IonQ Hackathon 2026
300+ projects entered by teams at 22 nodes. Browse them A to Z, or filter by node, track and theme.
What are quantum computers used for today?
What quantum computers do in chemistry, cryptography, optimization, finance and machine learning today and what comes next for each, with projects to run.
Free quantum computer simulators you can use today
Run a quantum circuit free on 14 simulators, then compare Quirk, Qiskit Aer, Cirq, PennyLane, Braket, IonQ and more by method, qubits and free terms.
Quantum programming languages and SDKs, compared
Qiskit, Cirq, PennyLane, Q#, OpenQASM and five more toolkits compared on one Bell state. The Qiskit, OpenQASM and Cirq versions run in your browser on Qollab.
Can you buy a quantum computer? What one costs, and how to run one free
What a quantum computer costs to buy, what a minute or a shot costs to rent on IBM, Braket, Azure and IonQ, and how to run a real one free. Every price dated.
Google withheld an ECDSA circuit
A forged zero-knowledge proof, an independent reconstruction, and an agent-driven leaderboard. What the episode says about checkable work.
Cross-Resonance Gate: Slices and Heatmaps
How the ZX entangling rate and static ZZ vary with detuning and drive amplitude, plotted from the PRA 2020 cross-resonance formulas.
Pulse Shapes and Envelopes, Visualized
How microwave pulses are shaped to control a quantum chip: Gaussian and sinusoidal envelopes, and the modulated pulses behind common gates.
Wigner Functions for Single-Qubit Quantum Gates
Pauli rotations rendered as Wigner functions, animated in two and three dimensions, with the density-operator and Bloch-vector groundwork.
Rabi Oscillations: Visualizing Excited-State Probability
A primer on the quantum dynamics of a driven two-level system, visualizing excited-state probability under the rotating-wave approximation (RWA).
A Sampling-Budget & Bit-String Analogy for Qubit Classifications
A Sampling-Budget & Bit-String Analogy for Qubit Classifications. A notebook by Onri Jay Benally, republished with permission.
What's new on Qollab
Playground upgrades, new features, and shipped improvements. The running changelog.
Meet the Spring 2026 cohort
13 teams building on real IonQ hardware: tools, music, visualizations, and games. The lineup, project by project.
Become a Qollab Ambassador
Champion quantum in your community and earn monthly IonQ hardware credits.
Creative Challenge: submissions closed
Grants and IonQ compute credits for open-source quantum projects. The call is closed — see what the funded teams built.