Transition behavior in the capacity of correlated noisy channels in arbitrary dimensions

Karimipour, V ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevA.74.032332
  3. Publisher: 2006
  4. Abstract:
  5. We construct a class of quantum channels in arbitrary dimensions for which entanglement improves the performance of the channel. The channels have correlated noise and when the level of correlation passes a critical value we see a sharp transition in the optimal input states (states which minimize the output entropy) from separable to maximally entangled states. We show that for a subclass of channels with some extra conditions, including the examples which we consider, the states which minimize the output entropy are the ones which maximize the mutual information. © 2006 The American Physical Society
  6. Keywords:
  7. Communication channels (information theory) ; Entropy ; Optimization ; Quantum theory ; Spurious signal noise ; Correlated noisy channels ; Entangled states ; Output entropy ; Quantum channels ; Channel capacity
  8. Source: Physical Review A - Atomic, Molecular, and Optical Physics ; Volume 74, Issue 3 , 2006 ; 10502947 (ISSN)
  9. URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.74.032332