Secure communication with single-photon two-qubit states

Details Secure communication with single-photon two-qubit states Secure communication with single-photon two-qubit states

2001-01-16

arxiv.org/abs/quant-ph/0101066v4

J. Phys. A 35, L407 (2002)

Physics

Quantum Physics

9 pages, 1 figure, 3 tables; final version

Scientific paper

10.1088/0305-4470/35/28/103

We propose a cryptographic scheme that is deterministic: Alice sends single photons to Bob, and each and every photon detected supplies one key bit -- no photon is wasted. This is in marked contrast to other schemes in which a random process decides whether the next photon sent will contribute to the key or not. The determinism is achieved by preparing the photons in two-qubit states, rather than the one-qubit states used in conventional schemes. In particular, we consider the realistic situation in which one qubit is the photon polarization, the other a spatial alternative. Further, we show how one can exploit the deterministic nature for direct secure communication, that is: without the need for establishing a shared key first.

Affiliated with

Also associated with

No associations

Rating

Secure communication with single-photon two-qubit states 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 Secure communication with single-photon two-qubit states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secure communication with single-photon two-qubit states will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-427001