Conditions on converting coherence into entanglement
Lian-Wu Yang(杨连武)1,2, Yun-Jie Xia(夏云杰)1
1 Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China;
2 Department of Physics and Information Engineering, Jining University, Qufu 273155, China
The present studies show that any nonzero amount of coherence of a system can be converted into entanglement between the system and an incoherent ancillary system via incoherent operations. According to this conclusion, we study the process of converting coherence into entanglement via a unitary operation where the initial ancillary system is of different quantum state. We find that some other conditions should be satisfied in converting coherence into entanglement. We also study the conditions of coherence consumption of converting coherence into entanglement.
Project supported by the National Natural Science Foundation of China (Grant Nos. 11204156, 11304179, and 11647172), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20133705110001), and the Natural Science Foundation of Shandong Province, China (Grant No. ZR2016AP09).
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