Year: 2023
Type: article
Abstract: Information exchange between two distant parties, where information is shared without physically transporting it, is a crucial resource in future quantum networks. Doing so with high-dimensional states offers the promise of higher information capacity and improved resilience to noise, but progress to date has been limited. Here we demonstrate how a nonlinear parametric process allows for arbitrary high-dimensional state projections in the spatial degree of freedom, where a strong coherent field enhances the probability of the process. This allows us to experimentally realise quantum transport of high-dimensional spatial information facilitated by a quantum channel with a single entangled pair and a nonlinear spatial mode detector. Using sum frequency generation we upconvert one of the photons from an entangled pair resulting in high-dimensional spatial information transported to the other. We realise a d = 15 quantum channel for arbitrary photonic spatial modes which we demonstrate by faithfully transferring information encoded into orbital angular momentum, Hermite-Gaussian and arbitrary spatial mode superpositions, without requiring knowledge of the state to be sent. Our demonstration merges the nascent fields of nonlinear control of structured light with quantum processes, offering a new approach to harnessing high-dimensional quantum states, and may be extended to other degrees of freedom too.
Source: Nature Communications
Institutions: University of the Witwatersrand, Institute of Photonic Sciences, Barcelona Institute of Science and Technology, Molecular Chirality Research Center, Chiba University, Fraunhofer Institute for Applied Optics and Precision Engineering, Friedrich Schiller University Jena, University of KwaZulu-Natal, Universitat Politècnica de Catalunya, National Metrology Institute of South Africa
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,290
Funders: Fundación Cellex, Centres de Recerca de Catalunya, European Commission, National Research Foundation, Ministry of Education, Culture, Sports, Science and Technology, Generalitat de Catalunya, Ministerio de Ciencia e Innovación, Japan Society for the Promotion of Science, Agencia Estatal de Investigación, European Metrology Programme for Innovation and Research, NextGenerationEU
Awards: G1175115578, G120905174, G1272927172, G1855990336, G1908469581, G2064873908, G2262748287, G2309174360, G2462415295, G2601397997, G2660406951, G2763573136, G280048558, G2988934680, G3005324705, G300979063, G318412399, G3480869486, Spatial entanglement transfer using conventional single mode fiber network, G3518538256, G3546882995, G357246561, G363809202, G3681454997, G3864391352, G4042783231, G4127740334, G425668148, G430777504, G4573501865, G4639731849, G4993905653, G5080475149, G5166550447, G5195188938, G531036588, G5421974903, G554358111, G5573611785, G5805502524, G5845768719, G5922099756, G6042476671, G6294180727, G631184005, G6482940084, G6520718613, G6656126374, G7084143925, G7486508868, 古代説話における諸寺縁起の研究, G7680777774, G7728130256, G773280237, G8180681537, G8326852995, G8546142835, Quantum Secure Networks Partnership, G8948146121, G99296377
OpenAlex ID: W4389675990