Optical physics Research update Structured photons slow down in a vacuum Speed of light drops slightly when photons are shaped by a mask Read article: Structured photons slow down in a vacuum
Ultracold matter Research update Interfering atoms measure gravity’s curvature Gravity measured at three different heights Read article: Interfering atoms measure gravity’s curvature
Quantum mechanics Research update SOLEIL scientists create double-slit thought experiment Einstein–Bohr debate continues Read article: SOLEIL scientists create double-slit thought experiment
Constants and units Feature Refraction redefines the pascal Based on highly accurate optical interferometry and fundamental quantum calculations, researchers in the US are developing an improved definition of the SI unit for pressure Read article: Refraction redefines the pascal
Ultrafast science Research update Plans unveiled for world’s first X-ray frequency comb Device could put fundamental physics to the test Read article: Plans unveiled for world’s first X-ray frequency comb
Structure and dynamics Research update Superheavy element 117 weighs in again New isotope "lawrencium-266" also detected Read article: Superheavy element 117 weighs in again
Constants and units Podcasts Building better atomic clocks Two keepers of atomic time at the National Physical Laboratory look to the future Read article: Building better atomic clocks
Ultrafast science Research update Interferometry tips the scales on antimatter New proposal for measuring how antihydrogen falls under gravity Read article: Interferometry tips the scales on antimatter
Metrology Feature The lure of G Jon Cartwright finds out why physicists are still scratching their heads over the value of the gravitational constant, "big G" Read article: The lure of G
Transport properties Research update Sound follows one direction "Non-reciprocal acoustic circulator" could be scaled for varying frequencies Read article: Sound follows one direction