Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System

Figure 2

(a) From top to down. The occupation probability of superconducting qubit in the state , , , , and without decoherence. (b) From top to down. The occupation probability of superconducting qubit in the state , , , , and with decoherence. The coupling strength of qubit-TLS is , and the coupling strength of qubit-microwave is . The frequency of the microwave field is .

(a)

(b)