Fundamental Physics

Experimental Physics Quantum Mechanics Standard Model Matter and Antimatter Dark Matter Research Relativity Theories of the Universe Particle Physics Elementary Particles Constants of Nature Research Collaborations Neutrino Research Atomic Transitions Mass States Matter and Universe Timekeeping Theoretical Physics Fundamental Constants Dark Matter Experimental Particle Physics

4 ARTICLES

4mo ago

Two Teams Report Working Thorium‑229 Nuclear Clocks

The devices use thorium nuclei embedded in calcium‑fluoride crystals probed by vacuum‑ultraviolet lasers to open a room‑temperature path toward more resilient, ultra‑precise timekeeping.

4 ARTICLES

4mo ago

Largest Global Optical Clock Comparison Paves Way to Redefine the Second

Fundamental Physics

Two Teams Report Working Thorium‑229 Nuclear Clocks

First Working Nuclear Clock Built Using Thorium-229

Researchers Drive Thorium-229 Nuclei With Laser Inside Opaque Solid

Electroplated Thorium on Steel Delivers Key Step Toward Compact Nuclear Clocks

JUNO Neutrino Observatory Starts Data Taking After 20,000-Ton Fill

Enhanced Dual-Comb Spectroscopy Reveals Previously Unknown Samarium Transitions

Largest Global Optical Clock Comparison Paves Way to Redefine the Second