Quantum Simulation of a Spin Chain

Click a qubit to flip its starting state, drag it up or down to change its local field, click a histogram bar to start from that basis state.

Time t-

Fidelity-

Energy E-

Energy drift-

Mean Mz-

Half-chain entropy-

Fidelity |<reference|simulated>|^2 and energy drift versus time; both reveal the Trotter error.

Digital quantum simulation of the transverse-field Ising chain H = -J sum Z_i Z_(i+1) - h sum X_i (Lloyd 1996; Trotter-Suzuki splitting) on up to 8 qubits (exact state vector). Disks show each qubit on the Bloch x-z plane.