Abstract:
It is shown that two-photon Bell states can be prepared by “spreading” of a two-photon wave packet (biphoton) in a dispersive medium without compensating for group delays between photons with orthogonal polarizations or using narrow-band filters but by selecting the time correlation function. This is possible because two-photon interference effects are manifested in the shape of the time correlation function of intensity due to its spreading.
Citation:
L. A. Krivitskii, M. V. Chekhova, ““Spreading” of a biphoton in a group-velocity-dispersion medium and two-photon interference”, Pis'ma v Zh. Èksper. Teoret. Fiz., 81:3 (2005), 125–128; JETP Letters, 81:3 (2005), 95–98