We investigate the spatiotemporal structure of the biphoton entanglement in parametric down-conversion (PDC) and we demonstrate its nonfactorable X-shaped geometry. Such a structure gives access to the ultrabroad bandwidth of PDC, and can be exploited to achieve a biphoton temporal localization in the femtosecond range. This extreme localization is connected to our ability to resolve the photon positions in the source near field. The nonfactorability opens the possibility of tailoring the temporal entanglement by acting on the spatial degrees of freedom of twin photons.

X entanglement: the nonfactorable spatiotemporal structure of biphoton correlation

BRAMBILLA, ENRICO;JEDRKIEWICZ, OTTAVIA;LUGIATO, LUIGI
2009

Abstract

We investigate the spatiotemporal structure of the biphoton entanglement in parametric down-conversion (PDC) and we demonstrate its nonfactorable X-shaped geometry. Such a structure gives access to the ultrabroad bandwidth of PDC, and can be exploited to achieve a biphoton temporal localization in the femtosecond range. This extreme localization is connected to our ability to resolve the photon positions in the source near field. The nonfactorability opens the possibility of tailoring the temporal entanglement by acting on the spatial degrees of freedom of twin photons.
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.102.223601
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.102.223601.pdf

accesso aperto

Descrizione: PDF editoriale
Tipologia: Altro materiale allegato
Licenza: Creative commons
Dimensione 741.53 kB
Formato Adobe PDF
741.53 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11383/1709627
Citazioni
  • ???jsp.display-item.citation.pmc??? 2
  • Scopus 56
  • ???jsp.display-item.citation.isi??? 49
social impact