Developer infrastructure for quantum computing
No SDK setup. No credentials. No complexity. Try a Bell circuit in 60 seconds, with nothing to install.
51 circuits · No signup required
Every run executes on a simulator: Qiskit, PennyLane and Cirq. Real quantum hardware is on the roadmap.
Only 00 and 11 appear, about half each: the correlation an entangled Bell state produces
In open beta
Three steps. Under 60 seconds. No account required to try.
Start from one of four ready-made Qiskit examples, or edit the code right in the browser.
The browser demo runs on Qiskit Aer. Real quantum hardware is on the roadmap.
A histogram of the measurement counts and the simulator run time, back in a few seconds.
A preview of the visualizations we are building. Qiskit and OpenQASM circuit pages show a circuit diagram today; Bloch sphere, state vector and density matrix views of your own runs are planned.
Single-qubit state visualization
Probability amplitudes
Shown on Qiskit and OpenQASM circuit pages
Mixed state analysis
Four circuits, two frameworks. Running a published circuit needs an account. The demo above does not.
Creates the Bell state |Phi+> = (|00> + |11>)/sqrt(2), the simplest demonstration of quantum entanglement. Two qubits are prepared so that their measurement outcomes are perfectly correlated. Such pairs are the resource behind teleportation, superdense coding, and entanglement-based quantum key distribution.
Searches an unstructured database of N=4 items using Grover's algorithm, finding the marked item with 100% probability in a single oracle query. Demonstrates amplitude amplification: the oracle marks the target with a phase flip, and the diffusion operator (inversion about the mean) boosts its probability from 25% to 100%. Provides a provably optimal quadratic speedup: O(sqrt(N)) vs O(N) classical.
Finds the ground state energy of the hydrogen molecule (H2) using the Variational Quantum Eigensolver (VQE), a hybrid quantum-classical algorithm that pairs a parameterized 2-qubit ansatz with COBYLA optimization. The qubit Hamiltonian is derived from the STO-3G basis via parity mapping with two-qubit reduction, giving an exact ground state of -1.1373 Hartree.
Implementation of the Quantum Approximate Optimization Algorithm (QAOA) for MaxCut from Farhi, Goldstone and Gutmann (2014), simulated on triangle, square and butterfly graphs (3 to 5 qubits) at depths p = 1 to 3. It does not test the paper's 3-regular-graph bound.