Magnets Mimic Black Hole Secrets ⚡ экспресс
Researchers simulated black hole evaporation using two spin chains (the Ising model in a transverse field), where one shrank (the hole) and the other grew (the radiation). Strikingly, the famous Page curve — the rise and fall of quantum entanglement — was reproduced without direct interaction between the parts, solely by changing the size of the quantum space. The curve’s shape depended on internal dynamics: at the critical point it was smooth, but when deviating, it became distorted. This approach turns interacting spin chains into an accessible platform for studying black hole information paradoxes on modern quantum devices.
A diary loses pages, yet the story migrates to the rest. Black holes act similarly: as they shrink (shown by Stephen Hawking), swallowed information shouldn't vanish; it eventually resurfaces. Theory predicts a specific rise-and-fall curve for this escape.
Physicists built a miniature version with two strings of tiny magnets—one for the black hole, the other for the universe. Removing magnets one by one from the “black hole” string mimicked evaporation. They measured entropy—shared information—between the strings, and the pattern matched perfectly.
At a precise magnetic tipping point, like a compass needle quivering before it flips, the information streamed out smoothly. These chains fit inside current quantum computers, turning them into labs for testing how the cosmos handles its records.
🎯 The Page curve was first proposed by physicist Don Page in 1993, and he bet Stephen Hawking that information is not lost in black holes. Hawking conceded the bet in 2004.
🎬 In the movie Interstellar, the protagonist sends a message from inside a black hole using gravity, hinting that information can escape – a scenario now being probed by these quantum magnet models.