The Quantum Beat: The Physical Principles of Atomic Clocks, by Fouad G. Major

Celestial and Mechanical Clocks.- Oscillations and Fourier Analysis.- Oscillators.- Quartz Clocks.- The Language of Electrons, Atoms, and Quanta.- Magnetic Resonance.- Corrections to Observed Atomic Resonance.- The Rubidium Clock.- The Classical Cesium Standard.- Atomic and Molecular Oscillators.- The Hydrogen Maser.- The Confinement of Ions.- The NASA Mercury Ion Experiment.- Optical Frequency Oscillators: Lasers.- Laser Cooling of Atoms and Ions.- Application of Lasers to Microwave Standards.- Measurement of Optical Frequency.- Applications: Time-Based Navigation.- Concluding Thoughts.