Effects of intrinsic decoherence on quantum correlations in a two superconducting charge qubit system

Measurement-induced nonlocality (MIN) quantifies the maximal global effect and bipartite quantum correlation due to the locally invariant projective measurements. In this article, we consider a pair of superconducting charge qubits serving as the physical carrier of quantum information. We study the nonlocal correlation in a pair of superconducting qubits characterized by entanglement and different forms of MIN. Further, we investigate the influence of intrinsic decoherence on the temporal evolution of quantum correlations in the considered physical system. It has shown that the Josephson energy is an effective system parameter against the intrinsic decoherence in enhancing the correlations. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

This article studies the nonlocal correlation and the influence of decoherence on the temporal evolution of a pair of superconducting charge qubits. The results show that Josephson energy enhances the resistibility against decoherence.