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

International Conference on Quantum Science and Applications 2016

Altintas, Azmi Ali^1

Faculty of Engineering and Architecture, Okan University, Istanbul, Turkey^1

关键词: Dephasing;    Dephasing channel;    Fisher information;    Noisy channel;    Steady state;    Steady state systems;    Thermodynamical equilibria;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/766/1/012011/pdf
DOI  :  10.1088/1742-6596/766/1/012011

来源: IOP

【 摘 要 】

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.