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# How Quantum Entanglement Creates Entropy
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/how-quantum-entanglement-creates-entropy-0esqrq/
- Published: 2024-04-02T23:12:18.000Z
- Updated: 2025-08-21T13:46:36.000Z
- Description: Entropy is behind one of the most fundamental laws of physics.
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 7, Episode 21, #ZZZ_Episode_13c2cf1d-89f5-441c-bb05-0306cb46aa40, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

Entropy is surely one of the most perplexing concepts in physics. It’s variously described as a measure of a system’s disorder - or as the amount of useful work that you can get from it - or as the information hidden by the system. Despite the seeming ambiguity in its definition, many physicists hold entropy to be behind one of the most fundamental laws of physics.