PRESERVING QUANTUM CORRELATIONS VIA DECOHERENCE CHANNELS WITH MEMORY

Kuantum hafızalı kanallar ele alınarak, bazı iki-parçalı giriş durumlarına farklı dekoherens kanallarının etkileri altında kuantum korelasyonların ölçüleri olarak kuantum koherens ve kuantum karşılıklı bilişimin dinamik gelişimleri incelenecektir. Gürültülü bir çevrede meyadan gelen herhangi bir kuantum işlem veya süreç altında kuantum korelasyonlar, sistem çevresiyle etkileştiğinden dolayı artamayan bir davranış sergilerler. Böyle bir durumda kuantum korelasyonlardaki bir artışın, parametrelerin ayarlanarak ve uygun giriş durumlarının seçimiyle sağlanabileceğini ifade edeceğiz. Böylece, kuantum korelasyonlar çevrenin etkisine karşın kısmen korunabilirler. Herhangi bir kuantum bilişim yükümlülüğünün gerçekleştirlmesi için kuantum koherens ve kuantum karşılıklı bilişimdeki kısmi kaybı önlemek için en uygun koşulların kuantum hafızayla elde edilebileceği gösterilebilir.

Anahtar Kelimeler:

Quantum coherence, Quantum mutual information, Quantum correlations, Quantum channels with memory

PRESERVING QUANTUM CORRELATIONS VIA DECOHERENCE CHANNELS WITH MEMORY

Considering the quantum memory channels, we study the dynamical evolutions of quantum coherence and quantum mutual information as measures of quantum correlations under the actions of different decoherence channels on some bipartite initial states. Under any quantum operation or process occurring in a noisy environment, quantum correlations exhibit behavior that does not increase due to the system interacting with its environment. We state that for such a case the decrement of quantum correlations can be improved by the suitable choice of the initial states and by adjusting the parameters. Thus quantum correlations can be partially preserved against the action of the environment. It can be shown that optimal conditions to prohibit the partial loss in quantum coherence and quantum mutual information for performing any quantum information task may be generated by the memory.

Keywords:

Quantum coherence, Quantum mutual information, Quantum correlations, Quantum channels with memory,

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