Testing quantum nonlocality of two-qubit entangled states under decoherence

The quantum nonlocal correlation of states plays an important role in the information and computing protocols. However, during transmission entangled channel, they will inevitably interact with environment, resulting degradation coherence then weakening correlation. Using a high probability testing scheme based on Hardy-type paradox, this paper we investigate two-qubit polarization when transmit through amplitude damping channel (ADC), phase (PDC) depolarization (DC). results show that DC has great influence testing, while PDC little states. Finally, also gives condition for successful ADC under weak measurement reversal operation. intensity increases, decoherence effect can be effectively reduced.