Spatio-temporal entanglement of twin photons: An intuitive picture

Alessandra Gatti*, Lucia Caspani, Tommaso Corti, Enrico Brambilla, Ottavia Jedrkiewicz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We draw an intuitive picture of the spatio-temporal properties of the entangled state of twin photons, where they are described as classical wave-packets. This picture predicts a precise relation between their temporal and transverse spatial separations at the crystal output. The space-time coupling described by classical arguments turns out to determine in a precise way the spatio-temporal structure of the quantum entanglement, analyzed by means of the biphotonic correlation and of the Schmidt dimensionality of the entanglement.

Original languageEnglish
Article number1461016
Number of pages12
JournalInternational Journal of Quantum Information
Issue number2
Publication statusPublished - Mar 2014


  • Quantum entanglement
  • Schmidt number
  • twin-photons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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