Average concurrence and entanglement swapping

Autor:	Vladimir S. Malinovsky, Mark Hillery, János A. Bergou, Siddhartha Santra, Dov Fields
Rok vydání:	2021
Předmět:	Physics Quantum Physics Quantum network Mixed states FOS: Physical sciences Concurrence State (functional analysis) Quantum entanglement Upper and lower bounds Simple (abstract algebra) Qubit Statistical physics Quantum Physics (quant-ph)
Zdroj:	Physical Review A. 104
ISSN:	2469-9934 2469-9926
Popis:	We study the role of average concurrence in entanglement swapping in quantum networks. We begin with qubit pure states, and there is a very simple rule governing the propagation of average concurrence in multiple swaps. We look at examples of mixed qubit states, and find the relation for pure states gives an upper bound on what is possible with mixed states. We then move on to qudits, where we make use of the I-concurrence. Here the situation is not as simple as for qubits, but in some cases relatively straightforward results can be obtained. Comment: Comments welcome
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e097c332e1ac841bfe69bbc9cf3ed4ca https://doi.org/10.1103/physreva.104.022425 Zobrazit plný text záznamu