Quantum Mechanics Demos

Interactive Experiments & Visualizations

Explore quantum phenomena with real-time calculations

Bell Test (CHSH Inequality)

Test quantum entanglement by measuring correlation at different angles. Classical physics predicts S ≤ 2, quantum mechanics predicts S ≤ 2√2 ≈ 2.828.

CHSH Parameter S
Run the test to see results

Double-Slit Interference

Observe wave-particle duality. When you measure which slit the particle goes through, the interference pattern disappears.

Observation: As measurement increases, the interference fringes disappear, revealing particle-like behavior.

Schrödinger Equation Solver

Solve the time-independent Schrödinger equation for different quantum systems and visualize wavefunctions.

Energy Eigenvalue
Select system and solve

Entanglement Entropy

Calculate von Neumann entropy to quantify quantum entanglement between subsystems. Higher entropy = more entanglement.

Von Neumann Entropy S
Calculate to see results

Quantum Circuit Builder

Build quantum circuits by adding gates, then simulate and measure results.

|0⟩ ─────────
|0⟩ ─────────
|0⟩ ─────────
Measurement Results
Build a circuit and simulate

Stern-Gerlach Experiment

Measure spin along different axes and observe quantization. Demonstrates quantum measurement and incompatible observables.

Results
Run experiment to see results

Quantum Tunneling

Calculate the probability of a particle tunneling through a potential barrier - impossible in classical mechanics!

Tunneling Probability
Calculate to see results