Understanding Ghost Interference
Tabish Qureshi, Pravabati Chingangbam, Sheeba Shafaq
TL;DR
This paper provides a theoretical analysis of ghost interference in entangled photons, revealing it as a combined effect of virtual double-slit creation and quantum erasure, with fringe width depending on both photons' wavelengths.
Contribution
It introduces a wave-packet dynamics approach to explain ghost interference, highlighting the role of entanglement and wavelength dependence in the phenomenon.
Findings
Ghost interference results from virtual double-slit and quantum erasure effects.
Fringe width depends on both photons' wavelengths when they are of different colors.
Theoretical framework clarifies the mechanisms behind ghost interference.
Abstract
The ghost interference observed for entangled photons is theoretically analyzed using wave-packet dynamics. It is shown that ghost interference is a combined effect of virtual double-slit creation due to entanglement, and quantum erasure of which-path information for the interfering photon. For the case where the two photons are of different color, it is shown that fringe width of the interfering photon depends not only on its own wavelength, but also on the wavelength of the other photon which it is entangled with.
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