Device-Independent Entanglement Quantification and Related Applications

Moroder, Tobias; Bancal, Jean-Daniel; Liang, Yeong Cherng; Hofmann, Martin; Gühne, Otfried

doi:10.1103/PhysRevLett.111.030501

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Title		Device-Independent Entanglement Quantification and Related Applications
Authors		Moroder, Tobias Bancal, Jean-Daniel Liang, Yeong Cherng Hofmann, Martin Gühne, Otfried
Published in		Physical Review Letters. 2013, vol. 111, no. 3
Abstract		We present a general method to quantify both bipartite and multipartite entanglement in a device-independent manner, meaning that we put a lower bound on the amount of entanglement present in a system based on the observed data only but independent of any quantum description of the employed devices. Some of the bounds we obtain, such as for the Clauser-Horne-Shimony-Holt Bell inequality or the Svetlichny inequality, are shown to be tight. Besides, device-independent entanglement quantification can serve as a basis for numerous tasks. We show in particular that our method provides a rigorous way to construct dimension witnesses, gives new insights into the question whether bound entangled states can violate a Bell inequality, and can be used to construct device-independent entanglement witnesses involving an arbitrary number of parties.
Identifiers		DOI: 10.1103/PhysRevLett.111.030501
Full text		Article (Published version) (159 Kb) - Free access
Structures		Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire
Citation (ISO format)		MORODER, Tobias et al. Device-Independent Entanglement Quantification and Related Applications. In: Physical Review Letters, 2013, vol. 111, n° 3. doi: 10.1103/PhysRevLett.111.030501 https://archive-ouverte.unige.ch/unige:47341