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
See everything being built across each space.
Expert notes
Expert notes and explainers. Real code, real figures, openly shared.
Krylov quantum diagonalization of lattice Hamiltonians
Estimating ground-state energies on real hardware with Krylov subspace methods, worked end to end.
2-qubit states, visualized 8 ways
One entangled state rendered as Bloch spheres, steering ellipsoids, Wigner functions, and more.
A sampling-budget & bit-string analogy for qubit classifications
An intuition-first analogy for how measurement shots relate to qubit quality classes.
Rabi oscillations: visualizing excited-state probability
A driven qubit’s excited-state probability, oscillating in time.
What's happening
Open calls, programs, and what's new on Qollab.
Creative Challenge: submissions closed
Grants and IonQ compute credits for open-source quantum projects. The call is closed — see what the funded teams built.
Become a Qollab Ambassador
Champion quantum in your community and earn monthly IonQ hardware credits.
What's new on Qollab
Playground upgrades, new features, and shipped improvements. The running changelog.