Related by context. Frequent words. (Click for all words.) 64 atoms 62 Bose Einstein condensate 62 excitons 58 electrons 58 rubidium 58 laser pulse 58 photons 57 nuclei 57 resonant frequency 57 resonator 57 magnetic flux 56 magnetic fields 56 magnetization 56 neutrons 56 muon 56 electron 56 electron spin 56 picosecond 56 nanocrystals 56 atomic nuclei 56 superfluid 56 spacetime 55 GPa 55 qubit 55 laser pulses 55 muons 55 Brownian motion 55 quantum dot 55 GeV 55 hydrogen atoms 55 crystal lattice 54 photonic crystal 54 isotropic 54 oxygen atom 54 fermions 54 nanowire 54 photon 54 radioactive decay 54 oxygen atoms 54 femtoseconds 53 ferromagnetic 53 reactants 53 picoseconds 53 resonators 53 micron sized 53 oscillations 53 dimer 53 microscale 53 quark gluon plasma 53 ionized gas 53 nanocrystal 53 electron beams 53 waveguides 52 phonons 52 nanotube 52 ions 52 X ray emission 52 hydrogen atom 52 filaments 52 amplitudes 52 excitation 52 liquid droplets 52 JILA 52 superposition 52 microstructures 52 silicon substrate 51 semiconducting 51 gravitationally 51 superconductor 51 neutron 51 particles 51 nanotubes 51 graphene sheets 51 femtosecond 51 quantum dots 51 spectra 51 galaxy cluster 51 subatomic 51 nanowires 51 positrons 51 ejecta 51 X ray beam 51 filament 51 bandgap 51 dimers 50 electromagnet 50 oscillation 50 helices 50 liquid helium 50 nanometer sized 50 atom 50 atomic nucleus 50 quantum mechanical 50 galaxy clusters 50 interferometer 50 millionths 50 WIMPs 50 high temperature superconductivity 50 chirality 50 angular momentum 50 photodetectors