Print Email Facebook Twitter Error correlations in photonic qudit-mediated entanglement generation Title Error correlations in photonic qudit-mediated entanglement generation Author Liu, X. (TU Delft QuTech Advanced Research Centre; Universiteit Leiden; Kavli institute of nanoscience Delft) Bharos, N.P. (TU Delft QID/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft; Massachusetts Institute of Technology) Markovich, L. (TU Delft QID/Borregaard Group; TU Delft QuTech Advanced Research Centre; Universiteit Leiden; Kavli institute of nanoscience Delft; National University of Science and Technology MISiS) Borregaard, J. (TU Delft QN/Borregaard groep; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft; Harvard University) Date 2024 Abstract Generating entanglement between distributed network nodes is a prerequisite for the quantum internet. Entanglement distribution protocols based on high-dimensional photonic qudits enable the simultaneous generation of multiple entangled pairs, which can significantly reduce the required coherence time of the qubit registers. However, current schemes require fast optical switching, which is experimentally challenging. In addition, the higher degree of error correlation between the generated entangled pairs in qudit protocols compared to qubit protocols has not been widely studied in detail. We propose a qudit-mediated entangling protocol that completely circumvents the need for optical switches at the expense of a lower success probability of the scheme. Furthermore, we quantify the amount of error correlation between the simultaneously generated entangled pairs and analyze the effect on entanglement purification algorithms and teleportation-based quantum error correction. We find that optimized purification schemes can efficiently correct the correlated errors, while the quantum error correction codes studied here perform worse than for uncorrelated error models. To reference this document use: http://resolver.tudelft.nl/uuid:5c9f84e9-2c44-49a8-bc4e-884804fa5011 DOI https://doi.org/10.1103/PhysRevResearch.6.023075 ISSN 2643-1564 Source Physical Review Research, 6 (2) Part of collection Institutional Repository Document type journal article Rights © 2024 X. Liu, N.P. Bharos, L. Markovich, J. Borregaard Files PDF PhysRevResearch.6.023075.pdf 3.71 MB Close viewer /islandora/object/uuid:5c9f84e9-2c44-49a8-bc4e-884804fa5011/datastream/OBJ/view