期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms5502
关键词
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资金
- Austrian Science Fund (FWF) through the Special Research Program (SFB) Foundations and Applications of Quantum Science (FoQuS) [F4006-N16]
- European Community Framework Programme 7 (SIQS) [600645]
- Vienna Doctoral Program on Complex Quantum Systems (CoQuS) [W1210-2]
- MarieCurie IEF [QuaCoCoS-302021]
- EPSRC
- EPSRC [EP/I012451/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I012451/1] Funding Source: researchfish
- Austrian Science Fund (FWF) [W1210] Funding Source: Austrian Science Fund (FWF)
Photonics has become a mature field of quantum information science, where integrated optical circuits offer a way to scale the complexity of the set-up as well as the dimensionality of the quantum state. On photonic chips, paths are the natural way to encode information. To distribute those high-dimensional quantum states over large distances, transverse spatial modes, like orbital angular momentum possessing Laguerre Gauss modes, are favourable as flying information carriers. Here we demonstrate a quantum interface between these two vibrant photonic fields. We create three-dimensional path entanglement between two photons in a nonlinear crystal and use a mode sorter as the quantum interface to transfer the entanglement to the orbital angular momentum degree of freedom. Thus our results show a flexible way to create high-dimensional spatial mode entanglement. Moreover, they pave the way to implement broad complex quantum networks where high-dimensionally entangled states could be distributed over distant photonic chips.
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