Intrinsic Decoherence-Induced Generation of Quantum Information Resources in Coupled Semiconductor Charge Qubits

Abstract

The preservation of non-classical correlation resources requires optimal procedures, strategies, and the proper design of the transmitting channels. In this scenario, we explore the dynamics of quantum correlations, namely local quantum Fisher information (LQFI) and concurrence, in a system of two strongly coupled semiconductor charge qubits confined in semiconductor pair quantum dots (SPQDs). The effects of tunneling, detuning, and dipole-dipole interactions are considered in both the absence and presence of intrinsic decoherence. Our results show that these interactions play a crucial role in transforming initially separable states into correlated states. Strengthening the tunneling coupling enhances the generation of semi-regular maximal two-qubit correlations. Increasing the detuning weakens both LQFI and concurrence, while strong dipole-dipole interactions mitigate decoherence-induced degradation and stabilize the quantum coherence. As decoherence increases, the amplitudes and frequencies of the correlations decrease, leading to sudden birth- death and sudden change phenomena. Notably, the robustness of LQFI against decoherence suggests its potential applications in quantum metrology. The two-qubit coherence induced by dipole interactions can be preserved against decoherence effects by increasing the tunneling coupling, providing an optimized framework for solid-state quantum information processing.