- Elementary Particles, Quantum Field Theory 37
- Quantum Field Theories, String Theory 35
- Quantum Physics 30
- Nuclear Energy 23
- Astronomy, Astrophysics and Cosmology 22
- Classical and Quantum Gravitation, Relativity Theory 22
- Optics, Lasers, Photonics, Optical Devices 22
- Physics, general 16
- Measurement Science and Instrumentation 15
- Nuclear Physics, Heavy Ions, Hadrons 14
- Particle and Nuclear Physics 14
- Condensed Matter Physics 10
- Optical and Electronic Materials 10
- Microwaves, RF and Optical Engineering 9
- Particle Acceleration and Detection, Beam Physics 9
- Atomic, Molecular, Optical and Plasma Physics 6
- Characterization and Evaluation of Materials 6
- Applied and Technical Physics 5
- Astronomy, Observations and Techniques 5
- Classical and Continuum Physics 5