Acoustic Black Holes Get Entangled Differently ⚡ экспресс
Researchers studied an acoustic black hole (a flow where sound gets trapped) and discovered that quantum entanglement inside it grows with volume, not surface area. Imagine cobwebs packing a whole ball, not just coating its shell. Why? It's all about paired sound waves born at the horizon.
An acoustic black hole is a fluid flow faster than sound, so sound waves can't escape. The boundary—the surface where the flow speed reaches the speed of sound—spawns pairs of phonons: sound quanta, one flying away, the other plunging inward.
Calculations show that the entropy of entanglement here depends on volume, not horizon area. Phonons throughout the interior are connected to each other—as if invisible strings weave through a waterfall, linking every drop to the others. Paradoxically, particles born at the boundary and forever separated by it retain a shared memory at any distance inside the flow.
🎯 If interstellar gas flowed around a massive object at supersonic speed, an acoustic black hole would form—and even the roar of a supernova couldn't escape.
🎬 In Fred Hoyle's novel 'The Black Cloud,' an intelligent gas cloud manipulates matter flows, resembling an acoustic analogue but without quantum effects.