Researchers at the University of Tokyo have published a paper in the journal Nature that describes a new laser technique that is capable of cooling a gas of positronium atoms to temperatures as low as 1 K.

This research is fascinating as it offers a new approach to cooling gases to extremely low temperatures. The use of lasers to accomplish this feat is a testament to the incredible advancements made in laser technology. Additionally, the potential applications of this technique in fields such as quantum computing and precision measurement are exciting to consider. It will be interesting to see how this research develops and what other innovative uses for this cooling method will arise.