Two-photon anti-coalescence interference: The signature of two-photon entanglement
Kaige Wang, Shiyao Zhu · Europhysics Letters (EPL) · 2003
We study a general theory on the interference of two-photon wavepacket in a beam splitter. We find that the symmetry of the two-photon spectrum plays an important role in the manners of interference. We distinguish the coalescence and anti-coalescence interferences, and prove that the anti-coalescence interference is the signature of photon entanglement.