Three really cool quantum optics/cQED sections added to the @qiskit textbook:

1/ exploring Jaynes-Cummings parameters experimentally on real devices
2/ qubit ac stark shift measurements
3/ (cross resonance) hamiltonian tomography

by @karamlouMIT @nickbronn @frraaank

THREAD

In 1/ @karamlouMIT nicely backs out the parameters of the Jaynes-Cummings hamiltonian (chi, g, kappa, gamma) by setting up experiments using @qiskit pulse. This is training that every 1st year grad student goes through, and I'm excited to see it online

https://qiskit.org/textbook/ch-quantum-hardware/Jaynes-Cummings-model.html

In 2/ @karamlouMIT populates the resonator of ibmq_armonk with photons and measures the qubit's 0-1 transition frequency as a function of number of photons to back out the ac stark shift parameters

https://qiskit.org/textbook/ch-quantum-hardware/ac-Stark-shift.html

In 3/ @nickbronn creates a duffing oscillator model of ibmq_athens and shows how to use the pulse simulator to determine the parameters of the cross resonance hamiltonian

https://qiskit.org/textbook/ch-quantum-hardware/hamiltonian-tomography.html

These sections add to our existing sections describing circuit QED and transmon physics, with more on the way. Cheers to @karamlouMIT, @nickbronn and @frraaank for working hard on these.