6533b870fe1ef96bd12cfe14
RESEARCH PRODUCT
Transition behavior in the channel capacity of two-quibit channels with memory
G. Massimo PalmaChiara MacchiavelloS. Virmanisubject
PhysicsData_CODINGANDINFORMATIONTHEORYCoherent informationQuantum channelQuantum capacityTopologyUpper and lower boundsAtomic and Molecular Physics and OpticsClassical capacityQuantum mechanicsQuantum informationAmplitude damping channelQuantum mutual informationComputer Science::Information Theorydescription
We prove that a general upper bound on the maximal mutual information of quantum channels is saturated in the case of Pauli channels with an arbitrary degree of memory. For a subset of such channels we explicitly identify the optimal signal states. We show analytically that for such a class of channels entangled states are indeed optimal above a given memory threshold.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-01-15 |