Measuring a qubit's memory.

A real T1 relaxation-time experiment — prepare a qubit in its excited state, wait an increasing delay, measure how often it's decayed — run against a simulated noisy qubit on Qiskit's Aer simulator. The decay curve is genuinely measured from repeated circuit executions, then fit to extract T1. No IBM Quantum account is configured here, so this is an honestly simulated qubit, not live hardware calibration data.