Channel capacity enhancement with indefinite causal order - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Article Dans Une Revue Physical Review A Année : 2020

Channel capacity enhancement with indefinite causal order

Résumé

Classical communication capacity of a channel can be enhanced either through a device called a 'quantum switch' or by putting the channel in a quantum superposition. The gains in the two cases, although different, have their origin in the use of a quantum resource, but is it the same resource? Here this question is explored through simulating large sets of random channels. We find that quantum superposition always provides an advantage, while the quantum switch does not: it can either increase or decrease communication capacity. The origin of this discrepancy can be attributed to a subtle combination of superposition and non-commutativity.
Fichier principal
Vignette du fichier
Loi1.pdf (644.89 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

cea-02284796 , version 1 (10-03-2021)

Identifiants

Citer

Nicolas Loizeau, Alexei Grinbaum. Channel capacity enhancement with indefinite causal order. Physical Review A, 2020, 101, pp.012340. ⟨10.1103/PhysRevA.101.012340⟩. ⟨cea-02284796⟩
196 Consultations
56 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More