Intrinsic quantum correlations of weak coherent states for quantum communication
Document Type
Article
Publication Date
3-18-2011
Abstract
Intrinsic quantum correlations of weak coherent states are observed between two parties through a novel detection scheme, which can be used as a supplement to the existence decoy-state Bennett-Brassard 1984 protocol and the differential phase-shift quantum key distribution (DPS-QKD) protocol. In a proof-of-principle experiment, we generate bipartite correlations of weak coherent states using weak local oscillator fields in two spatially separated balanced homodyne detections. We employ a nonlinearity of postmeasurement method to obtain the bipartite correlations from two single-field interferences at individual homodyne measurements. This scheme is then used to demonstrate bits correlations between two parties over a distance of 10 km through a transmission fiber. We believe that the scheme can add another physical layer of security to these protocols for quantum key distribution. © 2011 American Physical Society.
Publication Title
Physical Review A - Atomic, Molecular, and Optical Physics
Recommended Citation
Sua, Y.,
Scanlon, E.,
Beaulieu, T.,
Bollen, V.,
&
Lee, K.
(2011).
Intrinsic quantum correlations of weak coherent states for quantum communication.
Physical Review A - Atomic, Molecular, and Optical Physics,
83(3).
http://doi.org/10.1103/PhysRevA.83.030302
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/9972
