Signal Enhancement and Background Suppression Using Interference and Entanglement
Quantum Physics
2010-12-21 v2
Abstract
We describe two-photon absorption processes excited by entangled pairs, but not by non-entangled pairs of the same energy and polarization. Photon states are selected for destructive interference in the non-entangled process between different sequences of absorption via multiple intermediate states. A non-zero entangled absorption cross section is obtained by varying the entanglement time and pair delay parameters. Detailed energy and polarization requirements are derived for Rb 5S1/2 --> 5D3/2 transitions. Applications to Quantum Steganography and Quantum Key Distribution are discussed.
Cite
@article{arxiv.1003.0423,
title = {Signal Enhancement and Background Suppression Using Interference and Entanglement},
author = {Keith Kastella and Ralph S. Conti},
journal= {arXiv preprint arXiv:1003.0423},
year = {2010}
}
Comments
9 pages, 3 figures, to appear in Physical Review A