摘要
The macroscopic quantum entanglement in capacitively coupled SQUID （superconducting quantum interference device）-based charge qubits is investigated theoretically. The entanglement characteristic is discussed by employing the quantum Rabi oscillations and the concurrence. An interesting conclusion is obtained, i.e., the magnetic fluxes φx1 and φx2 through the superconducting loops can adjust the entanglement degree between the qubits.
The macroscopic quantum entanglement in capacitively coupled SQUID （superconducting quantum interference device）-based charge qubits is investigated theoretically. The entanglement characteristic is discussed by employing the quantum Rabi oscillations and the concurrence. An interesting conclusion is obtained, i.e., the magnetic fluxes φx1 and φx2 through the superconducting loops can adjust the entanglement degree between the qubits.
基金
Project supported by the National Natural Science Foundation of China (Grant No. 10574060)
the Natural Science Foundation of Shandong Province, China (Grant No. Y2008A23)
Project of Shandong Province Higher Educational Science and Technology Program (Grant No. J09LA07)
