An elementary quantum network of single atoms in optical cavities

被引:710
作者
Ritter, Stephan [1 ]
Noelleke, Christian [1 ]
Hahn, Carolin [1 ]
Reiserer, Andreas [1 ]
Neuzner, Andreas [1 ]
Uphoff, Manuel [1 ]
Muecke, Martin [1 ]
Figueroa, Eden [1 ]
Bochmann, Joerg [1 ]
Rempe, Gerhard [1 ]
机构
[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany
关键词
ENTANGLEMENT DISTRIBUTION; LINEAR OPTICS; ENSEMBLES; MEMORY; COMMUNICATION; TRANSITIONS; INFORMATION; REPEATERS; INTERFACE; DISTANCE;
D O I
10.1038/nature11023
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Quantum networks are distributed quantum many-body systems with tailored topology and controlled information exchange. They are the backbone of distributed quantum computing architectures and quantum communication. Here we present a prototype of such a quantum network based on single atoms embedded in optical cavities. We show that atom-cavity systems form universal nodes capable of sending, receiving, storing and releasing photonic quantum information. Quantum connectivity between nodes is achieved in the conceptually most fundamental way-by the coherent exchange of a single photon. We demonstrate the faithful transfer of an atomic quantum state and the creation of entanglement between two identical nodes in separate laboratories. The non-local state that is created is manipulated by local quantum bit (qubit) rotation. This efficient cavity-based approach to quantum networking is particularly promising because it offers a clear perspective for scalability, thus paving the way towards large-scale quantum networks and their applications.
引用
收藏
页码:195 / U73
页数:7
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