Physics – Quantum Physics
Scientific paper
2004-03-29
Physics
Quantum Physics
19 pages. Requires Rinton-P9x6.cls. v2 has some minor errors/typoes corrected and the claims of remark 22 toned down (proofs a
Scientific paper
Continuing our earlier work (quant-ph/0401060), we give two alternative proofs of the result that a noiseless qubit channel has identification capacity 2: the first is direct by a "maximal code with random extension" argument, the second is by showing that 1 bit of entanglement (which can be generated by transmitting 1 qubit) and negligible (quantum) communication has identification capacity 2. This generalises a random hashing construction of Ahlswede and Dueck: that 1 shared random bit together with negligible communication has identification capacity 1. We then apply these results to prove capacity formulas for various quantum feedback channels: passive classical feedback for quantum-classical channels, a feedback model for classical-quantum channels, and "coherent feedback" for general channels.
No associations
LandOfFree
Identification via Quantum Channels in the Presence of Prior Correlation and Feedback 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 Identification via Quantum Channels in the Presence of Prior Correlation and Feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Identification via Quantum Channels in the Presence of Prior Correlation and Feedback will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-241231