Simulator WorkbenchMulti-Backend (Qiskit · Cirq · PennyLane)
Interactive Quantum Circuit Builder
Drag and drop quantum gates or use keyboard shortcuts. Real-time Qiskit simulation calculates exact statevectors, measurement histograms, and Bloch sphere coordinates.
Qubits:
Presets:
Backend:
Shots:
Quantum Gate Toolbox
(Click a gate or press hotkey to place on selected wire)Quantum Circuit Board
2 Qubits · 8 Stepsq[0]|0⟩
H
S2
S3
S4
S5
S6
S7
q[1]|0⟩
S0
S2
S3
S4
S5
S6
S7
💡 Click to place gate · Right-click/Del to removeBackend: Qiskit Aer (Local)
Live 3D Bloch Spheres
2 Qubit VectorsQubit 0 Bloch SphereEntangled / Mixed
|0⟩ (+Z)
|1⟩ (-Z)
|+⟩ (+X)
Pure Bloch Vector Undefined
Qubit 0 is entangled with another qubit. Its reduced density matrix has purity Tr(ρ²) < 1.0, meaning quantum information is non-locally distributed.
Qubit 1 Bloch SphereEntangled / Mixed
|0⟩ (+Z)
|1⟩ (-Z)
|+⟩ (+X)
Pure Bloch Vector Undefined
Qubit 1 is entangled with another qubit. Its reduced density matrix has purity Tr(ρ²) < 1.0, meaning quantum information is non-locally distributed.