Robustness of device-independent dimension witnesses

被引：28

作者：

Dall'Arno, Michele ^{[1
,2
]}

Passaro, Elsa ^{[1
]}

Gallego, Rodrigo ^{[1
]}

Acin, Antonio ^{[1
,3
]}

机构：

[1] ICFO Inst Ciencies Foton, E-08860 Castelldefels, Barcelona, Spain

[2] Nagoya Univ, Grad Sch Informat Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan

[3] ICREA Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain

来源：

PHYSICAL REVIEW A | 2012年 / 86卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.86.042312

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Device-independent dimension witnesses provide a lower bound on the dimensionality of classical and quantum systems in a "black box" scenario where only correlations between preparations, measurements, and outcomes are considered. We address the problem of the robustness of dimension witnesses, namely that to witness the dimension of a system or to discriminate between its quantum or classical nature, even in the presence of loss. We consider the case when shared randomness is allowed between preparations and measurements and provide a threshold in the detection efficiency such that dimension witnessing can still be performed.

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