期刊
PHYSICAL REVIEW APPLIED
卷 14, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.14.044025
关键词
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资金
- Agence Nationale de la Recherche through the INQCA project [PN-II-ID-JRP-RO-FR-2014-0013, ANR-14-CE260038]
- Paris Ile-de-France region in the framework of DIM SIRTEQ through the project ENCORE
- Investissements d'Avenir program (Labex NanoSaclay) [ANR-10-LABX-0035]
Multimode entanglement is an essential resource for quantum information in continuous-variable systems. Light-based quantum technologies will arguably not be built upon table-top bulk setups, but will presumably rather resort to integrated optics. Sequential bulk opticslike proposals based on cascaded integrated interferometers are not scalable with the current state-of-the-art low-loss materials used for continuous variables. We analyze the multimode continuous-variable entanglement capabilities of a compact currently available integrated bulk-optics analog: the array of nonlinear waveguides. We theoretically demonstrate that this simple and compact structure, together with a reconfigurable input pump distribution and multimode coherent detection of the output modes, is a versatile entanglement synthesizer in the spatial domain. We exhibit this versatility through analytical and numerically optimized multimode squeezing, entanglement, and cluster-state generation in different encodings. Our results re-establish spatial encoding as a contender in the game of continuous-variable quantum information processing.
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