Physics & Astronomy

Engineering

1. trapping 100%
2. frequency scanning 23%
3. excitation 21%
4. pumps 20%
5. stabilization 15%
6. coatings 8%

General

1. atomic clocks 89%
2. magnetometers 22%
3. buffers 20%
4. cells 19%
5. radiation 19%
6. sidebands 14%
7. pumping 14%
8. augmentation 13%
9. microwaves 12%
10. energy consumption 11%
11. frequency standards 8%
12. error signals 7%
13. clocks 6%
14. curves 5%

Chemistry and Materials

1. vapors 54%
2. gases 13%
3. rubidium 7%

Physics

1. frequency modulation 17%
2. electron paramagnetic resonance 9%
3. field strength 6%
4. wavelengths 5%

Mathematical and Computer Sciences

1. sensitivity 8%

Aerospace Sciences

1. magnetic fields 7%
2. slopes 6%

Engineering & Materials Science

1. Atomic clocks 83%
2. Vapors 60%
3. Frequency standards 27%
4. Magnetometers 25%
5. Frequency modulation 22%
6. Radiation 20%
7. Microwaves 17%
8. Surface emitting lasers 17%
9. Pumps 17%
10. Rubidium 15%
11. Pumping (laser) 15%
12. Feedback 14%
13. Alkali metals 12%
14. Gases 12%
15. Energy utilization 12%
16. Transparency 11%
17. Magnetic fields 11%
18. Paramagnetic resonance 10%
19. Quartz 10%
20. Stabilization 9%
21. Ground state 9%
22. Scanning 7%
23. Wavelength 7%
24. Modulation 7%
25. Lasers 6%
26. Injection lasers 5%
27. Semiconductor lasers 5%
28. Optical pumping 5%
29. Clocks 5%
30. Coatings 5%

Mathematics

1. Trapping 95%
2. Pump 18%
3. Enhancement 18%
4. Excitation 18%
5. Vertical-cavity Surface-emitting Laser (VCSEL) 18%
6. Electromagnetically Induced Transparency 17%
7. Radiation 17%
8. Electron Paramagnetic Resonance 17%
9. Feedback Loop 15%
10. Buffer 13%
11. Magnetic Field 11%
12. Cell 11%
13. Scanning 10%
14. Stabilization 9%
15. Wavelength 8%
16. External Field 7%
17. Transverse 6%
18. Coating 6%
19. Laser 5%
20. Microwave 5%
21. Energy Consumption 5%
22. Contrast Enhancement 5%