Quantum teleportation between remote atomic-ensemble quantum memories

Xiao Hui Bao, Xiao Fan Xu, Che Ming Li, Zhen Sheng Yuan, Chao Yang Lu, Jian Wei Pan

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Quantum teleportation and quantum memory are two crucial elements for large-scale quantum networks. With the help of prior distributed entanglement as a "quantum channel," quantum teleportation provides an intriguing means to faithfully transfer quantum states among distant locations without actual transmission of the physical carriers [Bennett CH, et al. (1993) Phys Rev Lett 70 (13):1895-1899]. Quantum memory enables controlled storage and retrieval of fast-flying photonic quantum bits with stationary matter systems, which is essential to achieve the scalability required for large-scale quantum networks. Combining these two capabilities, here we realize quantum teleportation between two remote atomic-ensemble quantum memory nodes, each composed of ∼108 rubidium atoms and connected by a 150-m optical fiber. The spin wave state of one atomic ensemble is mapped to a propagating photon and subjected to Bell state measurements with another single photon that is entangled with the spin wave state of the other ensemble. Two-photon detection events herald the success of teleportation with an average fidelity of 88(7)%. Besides its fundamental interest as a teleportation between two remote macroscopic objects, our technique may be useful for quantum information transfer between different nodes in quantum networks and distributed quantum computing.

Original languageEnglish
Pages (from-to)20347-20351
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume109
Issue number50
DOIs
Publication statusPublished - 2012 Dec 11

All Science Journal Classification (ASJC) codes

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