Hardware
What changes when the qubits are physical. Circuits on IBM machines, noise in the output, and the short window before the hardware forgets your state.
Posts
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15:45 Quantum Computing Why your qubits forget: decoherence in plain words
T1 is the qubit falling down, T2 is the phase slipping away. The two clocks that decide how long your circuit gets to run.
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14:36 Milestones Qiskit Global Summer School 2026: 4 labs, 473 seconds of real quantum time, 1 badge
5 IBM badges came from courses. This one came from 4 labs, a grader, and 473 seconds on real quantum hardware. The whole 2 weeks, logged from my own job history.
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22:22 Quantum Computing I ran a Bell state on real IBM quantum hardware
4096 shots on a real machine: the correlation survived, and just over one percent of the answers came back impossible. Reading the noise.