Open-system master equations
Realistic sensors exchange information and energy with environments.
$$\dot\rho=-\frac{i}{\hbar}[H,\rho]+\sum_j\mathcal D[L_j]\rho$$
Physical intuition
Realistic sensors exchange information and energy with environments.
Deep dive: physical mechanism
Lindblad jump operators model relaxation, dephasing and measurement-induced dynamics in a Markovian approximation.
What is measured experimentally?
Compute outcome probabilities and coherence over time.
Assumptions, noise and limitations
Non-Markovian baths require more elaborate descriptions.
Research and simulation exercise
Compare Ramsey sensitivity with and without Lindblad dephasing.
Connect the ideas
Explore the chapter overview, learning path, and references.