Sending classical information via three noisy channels in superposition of causal orders
| Autor: | Francisco Delgado, Nadia Belabas, Lorenzo M. Procopio, Marco Enríquez, Juan Ariel Levenson |
|---|---|
| Přispěvatelé: | Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
[PHYS]Physics [physics]
Physics Quantum Physics FOS: Physical sciences Quantum control Quantum channel 01 natural sciences 010305 fluids & plasmas Superposition principle Resource (project management) [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] Transmission (telecommunications) Stepping stone 0103 physical sciences Quantum Physics (quant-ph) 010306 general physics Previously treated Algorithm Quantum |
| Zdroj: | Physical Review A Physical Review A, American Physical Society, 2020, ⟨10.1103/PhysRevA.101.012346⟩ |
| ISSN: | 2469-9934 2469-9926 1050-2947 1094-1622 |
| DOI: | 10.1103/physreva.101.012346 |
| Popis: | In this work, we study the transmission of classical information through three completely depolarizing channels in superposition of different causal orders. We thus introduce the quantum 3-switch as a resource for quantum communications. We perform a new kind of quantum control that was not accessible to the previously treated two-channel case. The fine and full quantum control achieved using selected combinations of causal orders let us uncover new features: non monotonous behavior on the transmission of information with respect to the number of causal orders involved, and different values of the transmission of information depending on the specific combinations of causal orders considered. Our results are a stepping stone to assess efficiency of coherent quantum control and optimize resources in the implementation of new indefinite causal structures. Finally, we suggest an optical implementation using standard telecom technology to test our predictions. arXiv admin note: substantial text overlap with arXiv:1902.01807 |
| Databáze: | OpenAIRE |
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