Editing Quantum Entanglement (section)

== Remembering (Knowledge / Recall) 🧠 ==
Foundational facts, vocabulary, and key entities.

=== Core terminology & definitions ===
* '''[https://wikipedia.org/wiki/Quantum_entanglement Quantum entanglement]''' – A non-classical correlation between quantum systems.
* '''[https://wikipedia.org/wiki/Wave_function Wave function]''' – Describes the quantum state; entangled systems share a joint wave function.
* '''[https://wikipedia.org/wiki/Bell%27s_theorem Bell’s theorem]''' – Demonstrates that entanglement is incompatible with local hidden-variable theories.
* '''EPR''' – Abbreviation for the 1935 Einstein–Podolsky–Rosen paper questioning completeness of quantum mechanics.

=== Key components / actors / elements ===
* '''Particles involved''' – Photons, electrons, ions, or atoms.
* '''Experimental setups''' – Beam splitters, nonlinear crystals (SPDC), ion traps.
* '''Measurement devices''' – Polarizers, detectors, interferometers.
* '''Researchers''' – Albert Einstein, Boris Podolsky, Nathan Rosen, John Bell.

=== Canonical models, tools, or artifacts ===
* '''[https://wikipedia.org/wiki/Spin_(physics) Spin systems]'''
* '''[https://wikipedia.org/wiki/Polarization_(waves) Polarization]'''
* '''Quantum circuits''' for generating Bell states.

=== Typical recall-level facts ===
* First formalized in the 1935 EPR paradox.
* Central to quantum information science.
* Enables protocols like quantum teleportation and superdense coding.

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