Physics – Quantum Physics
Scientific paper
1997-12-17
Phys.Rev. A57 (1998) 3364-3369
Physics
Quantum Physics
RevTeX, 8 pages
Scientific paper
10.1103/PhysRevA.57.3364
We consider the problem of compression of the quantum information carried by ensemble of mixed states. We prove that for arbitrary coding schemes the least number of qubits needed to convey the signal states asymptotically faithfully is bounded from below by the Holevo function $S(\varrho)-\sum_ip_iS(\varrho_i)$. We also show that a compression protocol can be composed with another one, provided that the latter offers perfect transmission. Such a compound protocol is applied to the case of binary source. It is conjectured to reach the obtained bound. Finally, we point out that in the case of mixed signal states there could be a difference between the maximal compression rates at the coding schemes which are ``blind'' to the signal and the ones which assume the knowledge about the identities of the signal states.
No associations
LandOfFree
Limits for compression of quantum information carried by ensembles of mixed 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 Limits for compression of quantum information carried by ensembles of mixed states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limits for compression of quantum information carried by ensembles of mixed states will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-677743