Entanglement Quantification in Low-Temperature Superconducting Flux Qubits

This study aims to quantify entanglement in low-temperature superconducting flux qubits using mutual information and concurrence. It presents a theoretical framework, experimental setup for two-qubit systems, and simulations. Results show that the entanglement strength varies periodically with external magnetic flux and saturates with increasing inter-qubit coupling. These results offer guidance for optimizing superconducting quantum circuits in various quantum information processing applications.