Quantum Entanglement

Quantum Entanglement

Quantum entanglement is a fundamental phenomenon in quantum mechanics where two or more particles become linked in such a way that the state of one particle cannot be described independently of the state of the other(s), even when the particles are separated by large distances. This peculiar connection challenges our classical intuitions about the separability of distant objects.

Key Features

• Non-locality: Changes to one entangled particle instantaneously affect the other, regardless of the distance separating them.
• Superposition: Each particle exists in a superposition of states until measured, leading to correlated outcomes.
• Bell's Theorem: Demonstrates that no local hidden variable theories can explain the correlations predicted by quantum mechanics.

Applications

1. Quantum Computing: Utilizes entangled states to perform computations at speeds unattainable by classical computers.
2. Quantum Cryptography: Provides a secure communication method that is theoretically immune to eavesdropping.
3. Teleportation: Involves transferring quantum states between distant particles using entanglement.

Glossary

Superposition

A fundamental principle of quantum mechanics where particles can exist in multiple states simultaneously.

Bell's Theorem

A theorem that illustrates the impossibility of local hidden variables in explaining quantum entanglement.