Optimizing repeater schemes for the quantum internet
| Autor: | Stephanie Wehner, David Elkouss, Kenneth Goodenough |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Repeater Quantum Physics Quantum network Heuristic (computer science) FOS: Physical sciences TheoryofComputation_GENERAL Quantum entanglement 01 natural sciences Multiplexing 010305 fluids & plasmas Transmission (telecommunications) Computer engineering 0103 physical sciences Quantum Physics (quant-ph) 010306 general physics Quantum information science Quantum Communication channel |
| Zdroj: | Physical Review A: covering atomic, molecular, and optical physics and quantum information, 103(3) Physical Review A |
| ISSN: | 2469-9926 |
| DOI: | 10.1103/physreva.103.032610 |
| Popis: | The rate at which quantum communication tasks can be performed using direct transmission is fundamentally hindered by the channel loss. Quantum repeaters allow, in principle, to overcome these limitations, but their introduction necessarily adds an additional layer of complexity to the distribution of entanglement. This additional complexity - along with the stochastic nature of processes such as entanglement generation, Bell swaps, and entanglement distillation - makes finding good quantum repeater schemes non-trivial. We develop an algorithm that can efficiently perform a heuristic optimisation over a subset of quantum repeater schemes for general repeater platforms. We find a strong improvement in the generation rate in comparison to an optimisation over a simpler class of repeater schemes based on BDCZ repeater schemes. We use the algorithm to study three different experimental quantum repeater implementations on their ability to distribute entanglement, which we dub \emph{information processing} implementations, \emph{multiplexed} implementations, and combinations of the two. We perform this heuristic optimisation of repeater schemes for each of these implementations for a wide range of parameters and different experimental settings. This allows us to make estimates on what are the most critical parameters to improve for entanglement generation, how many repeaters to use, and which implementations perform best in their ability to generate entanglement. 39 pages, 29 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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