Atomic clocks and frequency standards
A stable atomic transition serves as a reference against which local oscillator drift is measured.
$$\delta\nu/\nu_0$$
Physical intuition
A stable atomic transition serves as a reference against which local oscillator drift is measured.
Deep dive: physical mechanism
Interrogate a narrow atomic transition and servo a laser or microwave oscillator to the resonance. Optical lattice clocks isolate atoms while suppressing systematic shifts.
What is measured experimentally?
Record clock error signals, Allan deviation and systematic frequency shifts.
Assumptions, noise and limitations
Blackbody radiation, lattice light shifts and collisions can limit accuracy.
Research and simulation exercise
Model a frequency-locking loop with oscillator noise and atomic readout.
Connect the ideas
Explore the chapter overview, learning path, and references.