Concentration and distribution of entanglement based on valley qubits system in graphene  

作　　者：Chuan Wang Wei-Wei Shen Si-Chen Mi Yong Zhang Tie-Jun Wang 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications

出　　处：《Science Bulletin》2015年第23期2016-2021,共6页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11404031;61205117;and61471050);Beijing Higher Education Young Elite Teacher Project(YETP0456);the Fundamental Research Funds for the Central Universities(2014RC0903);the State Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications)

摘　　要：Exploiting the optical excitation selection rules in graphene quantum dots, we investigate theoretically the entanglement generation process and entanglement concentration process of valley qubits. Our protocol shows that the graphene-based quantum dots can be distributed in a maximally entangled state through the interaction with single photons. In our proposed scheme, the setups are simplified as only single-photon detection is required. This provides a fast, all-optical manipulation of on-chip qubits,which gives an effective way for quantum information processing in graphene-based solid qubits.Exploiting the optical excitation selection rules in graphene quantum dots, we investigate theoretically the entanglement generation process and entanglement con- centration process of valley qubits. Our protocol shows that the graphene-based quantum dots can be distributed in a maximally entangled state through the interaction with single photons. In our proposed scheme, the setups are simplified as only single-photon detection is required. This provides a fast, all-optical manipulation of on-chip qubits, which gives an effective way for quantum information processing in graphene-based solid qubits.

关 键 词：Entanglement concentration ·Entanglement distribution · Valley qubits 

分 类 号：O471.1[理学—半导体物理]