Related by context. Frequent words. (Click for all words.) 61 spacetime 60 oscillations 59 quantum mechanical 59 quantum mechanics 58 Newtonian 58 magnetization 58 dynamical 58 fermions 57 vortices 57 oscillation 56 phonons 56 quantum theory 56 quantum gravity 56 superfluid 55 electromagnetism 55 atomic nuclei 55 muon 55 gravitation 55 laser pulse 54 fractals 54 plate tectonics 54 angular momentum 54 superfluidity 54 amplitudes 54 high temperature superconductivity 54 magnetic fields 54 fractal 54 differential equations 54 pulsations 53 torus 53 Einstein theory 53 gravitational lensing 53 general relativity 53 quantum physics 53 electrons 53 atoms 53 thermodynamic 52 interferometry 52 X ray emission 52 gravitational 52 photons 52 pendulums 52 helices 52 conductance 52 entropy 52 isotropic 52 photonic crystal 52 anisotropic 52 macroscopic 52 symmetries 51 radioactive decay 51 electron spin 51 anisotropy 51 quark gluon plasma 51 scalar 51 precession 51 perturbation 51 superposition 51 chirality 51 cosmological constant 51 positron 51 gravitational waves 51 perturbations 51 muons 51 thermodynamics 51 auroral 51 cosmology 51 electron 51 nanoscopic 50 molecular dynamics 50 cosmological 50 crystal lattice 50 WIMPs 50 Gaussian 50 subatomic particles 50 Earth magnetosphere 50 aerosol particles 50 subatomic 50 magnetar 50 atomic particles 50 photon 50 electron beams 50 particle 50 atomic nucleus 50 periodicity 50 hydrodynamic 49 interstellar dust 49 neutron star 49 DNA double helix 49 supersymmetry 49 galaxy clusters 49 superconductivity 49 topological 49 femtoseconds 49 FRET 49 cosmic microwave background 49 atmospheric circulation 49 theorems 49 vibrational 49 invariant 49 nonlinear