Quantum Key Distribution using Two Coherent States of Light and their Superposition

Details Quantum Key Distribution using Two Coherent States of Light and their Superposition Quantum Key Distribution using Two Coherent States of Light and their Superposition

1999-11-09

arxiv.org/abs/quant-ph/9911035v2

Phys. Rev. A62, 012312 (2000)

Physics

Quantum Physics

20 pages, 4 figures, RevTeX, submitted to PRA, Revised 2000/2/23

Scientific paper

10.1103/PhysRevA.62.012312

Quantum mechanical complementarity ensures the security of the key-distribution scheme reported by Brassard and Bennet in 1984 (BB84), but does not prohibit use of multi-photons as a signal carrier. We describe a novel BB84 scheme in which two nearly orthogonal coherent states carry the key, and the superposition of these states (cat states) protects the communication channel from eavesdropping. Information leakage to eavesdroppers can be determined from the visibility of the interferential fringes in the distribution of the outcome when a certain quadrature component is measured through homodyne detection. The effect of channel loss and detector inefficiency is discussed.

Affiliated with

Also associated with

No associations

Rating

Quantum Key Distribution using Two Coherent States of Light and their Superposition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum Key Distribution using Two Coherent States of Light and their Superposition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Key Distribution using Two Coherent States of Light and their Superposition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-277100