Print Email Facebook Twitter Optimizing practical entanglement distillation Title Optimizing practical entanglement distillation Author Rozpedek, F.D. (TU Delft QID/Wehner Group; TU Delft QuTech Advanced Research Centre) Schiet, Thomas (Student TU Delft) Lê, P.T. (TU Delft QID/Wehner Group; TU Delft QuTech Advanced Research Centre) Elkouss Coronas, D. (TU Delft Quantum Information and Software; TU Delft QuTech Academy; TU Delft QuTech Advanced Research Centre) Doherty, Andrew C. (University of Sydney) Wehner, S.D.C. (TU Delft Quantum Internet Division; TU Delft Quantum Information and Software; TU Delft QuTech Advanced Research Centre) Department QuTech Academy Date 2018-06-21 Abstract The goal of entanglement distillation is to turn a large number of weakly entangled states into a smaller number of highly entangled ones. Practical entanglement distillation schemes offer a trade-off between the fidelity to the target state and the probability of successful distillation. Exploiting such trade-offs is of interest in the design of quantum repeater protocols. Here, we present a number of methods to assess and optimize entanglement distillation schemes. We start by giving a numerical method to compute upper bounds on the maximum achievable fidelity for a desired probability of success. We show that this method performs well for many known examples by comparing it to well-known distillation protocols. This allows us to show optimality for many well-known distillation protocols for specific states of interest. As an example, we analytically prove optimality of the distillation protocol utilized within the Extreme Photon Loss entanglement generation scheme, even in the asymptotic limit. We proceed to present a numerical method that can improve an existing distillation scheme for a given input state, and we present an example for which this method finds an optimal distillation protocol. An implementation of our numerical methods is available as a Julia package. To reference this document use: http://resolver.tudelft.nl/uuid:fc7953a6-9231-4df0-963a-631e5f98bc01 DOI https://doi.org/10.1103/PhysRevA.97.062333 ISSN 2469-9926 Source Physical Review A: covering atomic, molecular, and optical physics and quantum information, 97 (6) Part of collection Institutional Repository Document type journal article Rights © 2018 F.D. Rozpedek, Thomas Schiet, P.T. Lê, D. Elkouss Coronas, Andrew C. Doherty, S.D.C. Wehner Files PDF PhysRevA.97.062333.pdf 1.18 MB Close viewer /islandora/object/uuid:fc7953a6-9231-4df0-963a-631e5f98bc01/datastream/OBJ/view