Protecting Two-qutrit Entanglement in Four Noise Channel Via Weak Measurement and Measurement Reversal.

The protection of quantum entanglement has always been the focus of researchers. We adopt the scheme of combining weak measurement and measurement reversal to explore the protection effect of two-qutrit system in four noise channels, i.e., the amplitude damping channel, the phase damping channel, the bit flip channel and the depolarizing channel. For the given qutrits state with α = β = γ = 1 3 , it is found that the protection scheme can help to protect entanglement in the amplitude damping channel, while for the state with α = β = 1 2 , γ = 0 , the protection scheme plays a protective role in the amplitude damping channel and the depolarizing channel. We also calculate and discuss how the negativity and the probability of success behave when adjusting the weak measurement or measurement reversal strength. In different noise channels, the entanglement can be kept as much as possible by choosing the appropriate weak measurement parameters. It provides a strong basis for the system to maintain maximum entanglement in different noise channels. [ABSTRACT FROM AUTHOR]