Quantum capacity of lossy channel with additive classical Gaussian noise : a perturbation approach
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چکیده
For a quantum channel of additive Gaussian noise with loss, in the general case of n copies input, we show that up to first order perturbation, any non-Gaussian perturbation to the product thermal state input has a less quantum information transmission rate when the input energy tend to infinitive. PACS number(s): 03.67.-a, 42.50.Dv, 89.70.+c
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تاریخ انتشار 2008