Abstract
We experimentally entangle freely propagating particles that never physically interacted with one another or which have never been dynamically coupled by any other means. This demonstrates that quantum entanglement requires the entangled particles neither to come from a common source nor to have interacted in the past. In our experiment we take two pairs of polarization entangled photons and subject one photon from each pair to a Bell-state measurement. This results in projecting the other two outgoing photons into an entangled state.
- Received 6 February 1998
DOI:https://doi.org/10.1103/PhysRevLett.80.3891
©1998 American Physical Society
Focus
Nobel Prize: Quantum Entanglement Unveiled
Published 4 October 2022
The 2022 Nobel Prize in Physics honors research on the foundations of quantum mechanics, which opened up the quantum information frontier.
See more in Physics