Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.090503
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Funding
- National Key Research and Development Program of China [2017YFA0304100, 2016YFA0301300, 2016YFA0301700]
- NSFC [11774335, 11734015, 11874345, 11821404, 11904357]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-SLH003]
- Science Foundation of the CAS [ZDRW-XH2019-1]
- Fundamental Research Funds for the Central Universities
- Science and Technological Fund of Anhui Province for Outstanding Youth [2008085J02]
- Anhui Initiative in Quantum Information Technologies [AHY020100, AHY060300]
- Austrian Science Fund (FWF) through the STARTproject [Y879-N27]
- Austrian Science Fund (FWF) through the Zukunftskolleg [ZK03]
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High-dimensional entanglement promises to greatly enhance the performance of quantum communication and enable quantum advantages unreachable by qubit entanglement. One of the great challenges, however, is the reliable production, distribution, and local certification of high-dimensional sources of entanglement. In this Letter, we present an optical setup capable of producing quantum states with an exceptionally high level of scalability, control, and quality that, together with novel certification techniques, achieve the highest amount of entanglement recorded so far. We showcase entanglement in 32-spatial dimensions with record fidelity to the maximally entangled state (F = 0.933 +/- 0.001) and introduce measurement efficient schemes to certify entanglement of formation (E-oF = 3.728 +/- 0.006). Combined with the existing multicore fiber technology, our results will lay a solid foundation for the construction of high-dimensional quantum networks.
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