Ramsey interferometry
A superposition accumulates relative phase while freely evolving.
$$P_0=\tfrac12[1+C\cos(\Delta\omega T+\phi_0)]$$
Physical intuition
A superposition accumulates relative phase while freely evolving.
Deep dive: physical mechanism
A pi/2 pulse prepares a superposition, detuning generates phase during T, and a final pi/2 pulse converts phase to population.
What is measured experimentally?
Oscillating fringe probabilities reveal frequency shifts and coherence contrast.
Assumptions, noise and limitations
Longer interrogation increases phase response but can lose contrast or introduce phase wrapping.
Research and simulation exercise
Fit a Ramsey fringe and optimize interrogation time for a given coherence time.
Connect the ideas
Explore the chapter overview, learning path, and references.