A new criterion to detect the entanglement present in a hyperentangled state, based on the evaluation of an entanglement witness, is presented. We show how some witnesses recently introduced for graph states, measured by only two local settings, can be used in this case. We also define a new witness W-3 that improves the resistance to noise by increasing the number of local measurements.
Hyperentanglement witness / Vallone, Giuseppe; Raino, Ceccarelli; DE MARTINI, Francesco; Mataloni, Paolo. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 78:6(2008), pp. 062305-1-062305-6. [10.1103/physreva.78.062305]
Hyperentanglement witness
VALLONE, GIUSEPPE;DE MARTINI, Francesco;MATALONI, Paolo
2008
Abstract
A new criterion to detect the entanglement present in a hyperentangled state, based on the evaluation of an entanglement witness, is presented. We show how some witnesses recently introduced for graph states, measured by only two local settings, can be used in this case. We also define a new witness W-3 that improves the resistance to noise by increasing the number of local measurements.File allegati a questo prodotto
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