Structures of Three Types of Local Quantum Channels Based on Quantum Correlations

作者：Guo, Zhihua^*; Cao, Huaixin; Qu, Shixian

来源：Foundations of Physics, 2015, 45(4): 355-369.

DOI：10.1007/s10701-015-9874-9

• Structure
• Local quantum channel
• Classical correlation
• Quantum correlation

In a bipartite quantum system, quantum states are classified as classically correlated (CC) and quantum correlated (QC) states, the later are important resources of quantum information and computation protocols. Since correlations of quantum states may vary under a quantum channel, it is necessary to explore the influence of quantum channels on correlations of quantum states. In this paper, we discuss CC-preserving, QC-breaking and strongly CC-preserving local quantum channels of the form and obtain the structures of these three types of local quantum channels. Moreover, we obtain a necessary and sufficient condition for a quantum state to be transformed into a CC state by a specific local channel in terms of the structure of the input quantum state. Lastly, as applications of the obtained results, we present a classification of local quantum channels and describe the quantum states which are transformed as CC ones by the corresponding local quantum channel.

• 出版日期2015-4
• 单位陕西师范大学