How to Maximize the Capacity of General Quantum Noisy Channels

Details How to Maximize the Capacity of General Quantum Noisy Channels How to Maximize the Capacity of General Quantum Noisy Channels

2008-10-09

arxiv.org/abs/0810.1726v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

A general quantum noisy channel is analyzed, wherein the transmitted qubits may experience symmetry-breaking decoherence, along with memory effects. We find the optimal basis not to be fully entangled, 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.

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