Nonlocal de Broglie Wavelength of a Two-Photon System

E. J. S. Fonseca 1 , Zoltan Paulinia 1 , P. Nussenzveig 2 , C. H. Monkena 1  und S. Padua 1 , 3
  • 1 Departamento de Fisica, Universidade Federal de Minas Gerais, Caixa Postal 702, Belo Horizonte, MG 30123-970, Brazil
  • 2 Instituto de Fisica, Universidade de Säo Paulo Caixa Postal 66318, Säo Paulo, SP 05315-970, Brazil
  • 3 Dipartimento di Fisica, Universitä degli Studi di Roma “La Sapienza”, Roma, 00185, Italy


We show that it is possible to associate a de Broglie wavelength to a composite system even when the constituent particles are separated spatially. The nonlocal de Broglie wavelength (A /2) of a two-photon system separated spatially is measured with an appropriate detection system. The two-photon system is prepared in an entangled state in space-momentum variables. - Pacs: 42.50.-p, 42.50.Ar

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