Using spin-5/2 nuclei of 173 Yb atoms trapped in an optical lattice, a Schrödinger-cat state persists for a coherence time of 1.4 × 10 3 s. In measuring external magnetic fields, the cat ...

The origins of optical metrology can be traced back to early human innovations. The invention of spectacles in 1280 marked a turning point, as lens design and analysis became necessary for vision ...

Many quick- and e-commerce firms have reportedly received notices from the Central Consumer Protection Authority (CCPA) for allegedly violating mandatory declaration rules of the Legal Metrology Act.