How to Measure the Chaos of Spacetime Itself ⚡ экспресс
Original: "Landauer entropy of spacetime"
A new method measures the entropy of spacetime, based on Landauer's principle: erasing information generates heat.
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Light carrying chaos: physicists now measure the 'wrinkledness' of spacetime by tallying the entropy of light rays. Crumple a piece of paper into a ball, and its entropy rises — just like in curved space. Maybe the whole cosmos is a giant 'bit', storing information in its creases.
🎯 A black hole doesn't care what falls into it: two objects with different internal entropies, when swallowed by the hole, will increase its entropy by the same amount — solely due to the horizon's growth.
S = \frac{A}{4}
S is entropy, A is the area of the black hole horizon in Planck units (very tiny squares of space).