Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 2: Quantum Thermodynamics and Open Quantum Systems

QI 2.9: Vortrag

Montag, 5. September 2022, 12:15–12:30, H9

Entanglement Preservation in Open Quantum System — •Mei Yu, Stefan Nimmrichter, and Otfried Gühne — Universität Siegen, Siegen, Germany

It's widely known that the entanglement will decay when system is exposed to the environment. In this paper, we study how to keep the entanglement against destructive effect from environment at different temperatures. Within the spin gases model, we firstly investigate the entangling ability of two-qubit gate in Markovian and non-Markovian dephasing environment. Then, we implement the specific reset operation on two-qubit system at stochastic times in order to keep entanglement in steady state. The steady-state entanglement behavior is analysed in both cases of Markvovian and non-Markovian dephasing noise with different temperatures. Excepting for considerable entanglement value, the difference between Markovian and non-Markovian effect can be observed directly.