Thermal Entanglement of superconducting qubits for arbitrary interaction strength

• Superconducting devices. Quantum entanglement. Thermal Transmon qubit. Josephson We investigate the thermal entanglement in two superconducting qubits for arbitrary interaction strength and ground state frequencies. calculate concurrence of system to quantify suggest a scheme, where an external tunable coupler qubit sandwich between generates The behavior is analyzed three different cases, which we consider effects temperature, qubit-qubit effective coupling strength, frequencies on What deserves mentioning here that achieve maximally entangled states, it better use with same also note given can be tuned by internal capacitance inductance.