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On Negativity and Quantum Fisher Information of an Open and Noisy System in the Steady State

In this work, we study the quantum Fisher information (QFI) per particle of an open (particles can enter and leave the system) and dissipative (far from thermodynamical equilibrium) steady state system of two qubits in noisy channels. We concentrate on two noisy channels these are dephasing and non-dephasing channels. We will show that under certain conditions QFI per particle is slightly greater than 1 for both systems. This means that both systems can be slightly entangled.

preprint2016arXivOpen access
Azmi Ali Altintas
quant-ph
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Azmi Ali Altintas

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