Thermal Entanglement in Superconducting Quantum-Interference-Device Qubits Coupled to Cavity Field
Pan Hai-Zhong, Kuang Le-Man · Chinese Physics Letters · 2004
We investigate thermal entanglement in a superconducting-quantum-interference-device qubit coupled to a cavity field. We show that the entanglement can be manipulated by varying temperature and an effective controlling parameter B which depends on the external field and characteristic parameters of the system. We find that there exists a critical value of the controlling parameter B c . Under a fixed temperature, increasing B can increase entanglement in the regime of B B c .