摘要
We study thermal entanglement in a two-superconducting-qubit system in two cases,either identical or distinct.By calculating the concurrence of system,we find that the entangled degree of the system is greatly enhanced in the case of very low temperature and Josephson energies for the identical superconducting qubits and our result is in a good agreement with the experimental data.
作者
TIAN Li-Jun
QIN Li-Guo
ZHANG Hong-Biao
田立君;秦立国;张宏标(Department of Physics,Shanghai University,Shanghai 200444;Shanghai Key Lab for Astrophysics,Shanghai 200234;Institute of Theoretical Physics,Northeast Normal University,Changchun 130024)
基金
Supported by the National Natural Science Foundation of China under Grant No 11075101
the Shanghai Leading Academic Discipline Project(No S30105)
the Shanghai Research Foundation under Grant No 07d222020.
