title: Robust Multiple-Range Coherent Quantum State Transfer.
abstract: We propose a multiple-range quantum communication channel to realize coherent two-way quantum state transport with high fidelity. In our scheme, an information carrier (a qubit) and its remote partner are both adiabatically coupled to the same data bus, i.e., an N-site tight-binding chain that has a single defect at the center. At the weak interaction regime, our system is effectively equivalent to a three level system of which a coherent superposition of the two carrier states constitutes a dark state. The adiabatic coupling allows a well controllable information exchange timing via the dark state between the two carriers. Numerical results show that our scheme is robust and efficient under practically inevitable perturbative defects of the data bus as well as environmental dephasing noise.
authors.affiliation: College of Electronics, Communication &Physics, Shandong University of Science and Technology, Qingdao 266510, China.|Beijing Computational Science Research Center, Beijing 100094, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Chen
authors.affiliation: College of Electronics, Communication &Physics, Shandong University of Science and Technology, Qingdao 266510, China.
authors.forename: Yan-Dong
authors.initials: YD
authors.lastname: Peng
authors.affiliation: Beijing Computational Science Research Center, Beijing 100094, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Li
authors.affiliation: Center for Coherence and Quantum Optics, and The Institute of Optics, University of Rochester, Rochester, NY 14627, USA.
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Qian