Entangled optical vortex links

J. Romero, J. Leach, B. Jack, M. R. Dennis, S. Franke-Arnold, S. M. Barnett, M. J. Padgett

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Optical vortices are lines of phase singularity which percolate through all optical fields. We report the entanglement of linked optical vortex loops in the light produced by spontaneous parametric down-conversion. As measured by using a Bell inequality, this entanglement between topological features extends over macroscopic and finite volumes. The entanglement of photons in complex three-dimensional topological states suggests the possibility of entanglement of similar features in other quantum systems describable by complex scalar functions, such as superconductors, superfluids, and Bose-Einstein condensates.

Original languageEnglish
Article number100407
Number of pages4
JournalPhysical Review Letters
Volume106
Issue number10
DOIs
Publication statusPublished - 11 Mar 2011

Keywords

  • orbital angular-momentum
  • bell inequality
  • interference
  • photons
  • states
  • entangled
  • optical vortex links

Projects

Cite this

Romero, J., Leach, J., Jack, B., Dennis, M. R., Franke-Arnold, S., Barnett, S. M., & Padgett, M. J. (2011). Entangled optical vortex links. Physical Review Letters, 106(10), [100407]. https://doi.org/10.1103/PhysRevLett.106.100407