How to maximize the capacity of general quantum noisy channels

Goren Gordon*, Gershon Kurizki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A general quantum noisy channel is analyzed, wherein the transmitted qubits may experience symmetry-breaking decoherence, along with memory effects. We examine generalized Bell-basis and find that the optimal basis is not the fully entangled one, but a combination of factorized and partially-entangled states in the presence of memory, asymmetry and the state-bias of the noise. Capacity-maximization is shown to be achievable by combining temporal shaping of the transmitted qubits and optimal basis selection.

Original languageEnglish
Pages (from-to)1071-1077
Number of pages7
JournalFortschritte der Physik
Issue number11-12
StatePublished - Nov 2009
Externally publishedYes


  • Dynamical control
  • Memory channels
  • Quantum information


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