Physics

Quantum Entanglement

Quantum entanglement is one of the most fascinating and counterintuitive phenomena in physics. Two entangled particles can instantaneously influence each other.

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Key Concepts

  • Entangled particles are mysteriously correlated
  • Changes to one instantly affect the other
  • Einstein called this "spooky action at a distance"
  • Forms the basis for quantum computing

Vocabulary

Quantum EntanglementParticles become correlated so that the state of one instantaneously influences the other.
SuperpositionA particle can exist in multiple states simultaneously until measured.
Wave FunctionA mathematical description of the state of a quantum particle.
PhotonThe elementary particle of light and electromagnetic radiation.
Quantum DecoherenceThe loss of quantum properties when a quantum system interacts with its environment.

Big Question

"Does quantum entanglement violate causality, or is information transfer impossible even though correlation exists?"

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