China’s “artificial sun” just broke a fusion limit scientists thought was unbreakable

Researchers using China’s “artificial sun” fusion reactor have broken through a long-standing density barrier in fusion plasma. The experiment confirmed that plasma can remain stable even at extreme densities if its interaction with the reactor walls is carefully controlled. This finding removes a major obstacle that has slowed progress toward fusion ignition. The advance could help future fusion reactors produce more power.

source https://www.sciencedaily.com/releases/2026/01/260101160855.htm