Expert notes
Notes and hands-on explainers from the researchers and engineers building quantum. Real code, real figures, openly shared.
Cross-Resonance Gate: Slices and Heatmaps
How the ZX entangling rate and static ZZ vary with detuning and drive amplitude, plotted from the PRA 2020 cross-resonance formulas.
Pulse Shapes and Envelopes, Visualized
How microwave pulses are shaped to control a quantum chip: Gaussian and sinusoidal envelopes, and the modulated pulses behind common gates.
Wigner Functions for Single-Qubit Quantum Gates
Pauli rotations rendered as Wigner functions, animated in two and three dimensions, with the density-operator and Bloch-vector groundwork.
Rabi Oscillations: Visualizing Excited-State Probability
A primer on the quantum dynamics of a driven two-level system, visualizing excited-state probability under the rotating-wave approximation (RWA).
A Sampling-Budget & Bit-String Analogy for Qubit Classifications
A Sampling-Budget & Bit-String Analogy for Qubit Classifications. A notebook by Onri Jay Benally, republished with permission.