Chinese researchers achieve record 1,400 seconds for quantum cat state

Researchers in China have achieved a new record by creating a quantum superposition state, known as a "quantum cat" state, that lasted for 1,400 seconds. This surpasses previous durations significantly and could enhance high-precision measurements and quantum computing. The experiment involved cooling 10,000 ytterbium atoms to near absolute zero and trapping them with light. Each atom was placed in a superposition of two different spin states, allowing for precise control and measurement. This breakthrough follows other recent advancements in quantum experiments, including the placement of a macroscopic object in superposition. The findings are detailed in a preprint paper available on ArXiv.