We discuss the possibility of quantum interferences and entanglement of photons that exist at different intervals of time, i.e., one photon being recorded before the other has been created. The corresponding two-photon correlation function is shown to violate Bell’s inequalities.
© 2011 Optical Society of America
Original Manuscript: February 8, 2011
Revised Manuscript: March 21, 2011
Manuscript Accepted: March 21, 2011
Published: April 15, 2011
R. Wiegner, C. Thiel, J. von Zanthier, and G. S. Agarwal, "Quantum interference and entanglement of photons that do not overlap in time," Opt. Lett. 36, 1512-1514 (2011)