Tests of Bell inequality with arbitrarily low photodetection efficiency and homodyne measurements

被引：12

作者：

Araujo, Mateus ^{[1
]}

Quintino, Marco Tulio ^{[1
]}

Cavalcanti, Daniel ^{[2
]}

Santos, Marcelo Franca ^{[1
]}

Cabello, Adan ^{[3
,4
]}

Cunha, Marcelo Terra ^{[5
]}

机构：

[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

[2] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

[3] Univ Seville, Dept Fis Aplicada 2, E-41012 Seville, Spain

[4] Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden

[5] Univ Fed Minas Gerais, Dept Matemat, BR-30123970 Belo Horizonte, MG, Brazil

来源：

PHYSICAL REVIEW A | 2012年 / 86卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

VIOLATION;

D O I：

10.1103/PhysRevA.86.030101

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show that hybrid local measurements combining homodyne measurements and photodetection provide violations of a Bell inequality with arbitrarily low photodetection efficiency. This is shown in two different scenarios: when one part receives an atom entangled to the field mode to be measured by the other part and when both parts make similar photonic measurements. Our findings promote the hybrid measurement scenario as a candidate for loophole-free Bell tests beyond previous expectations.

引用

页数：4

共 33 条

[1] Device-independent security of quantum cryptography against collective attacks [J].

Acin, Antonio ;

Brunner, Nicolas ;

Gisin, Nicolas ;

Massar, Serge ;

Pironio, Stefano ;

Scarani, Valerio .

PHYSICAL REVIEW LETTERS, 2007, 98 (23)

[2] EXPERIMENTAL TEST OF BELL INEQUALITIES USING TIME-VARYING ANALYZERS [J].

ASPECT, A ;

DALIBARD, J ;

ROGER, G .

PHYSICAL REVIEW LETTERS, 1982, 49 (25) :1804-1807

[3] No signaling and quantum key distribution [J].

Barrett, J ;

Hardy, L ;

Kent, A .

PHYSICAL REVIEW LETTERS, 2005, 95 (01)

[4]

Bell J. S., 1964, Physics, V1, P195, DOI [10.1103/physicsphysiquefizika.1.195, DOI 10.1103/PHYSICSPHYSIQUEFIZIKA.1.195, 10.1103/Physics-PhysiqueFizika.1.195]

[5] Bell tests for continuous-variable systems using hybrid measurements and heralded amplifiers [J].

Brask, Jonatan Bohr ;

Brunner, Nicolas ;

Cavalcanti, Daniel ;

Leverrier, Anthony .

PHYSICAL REVIEW A, 2012, 85 (04)

[6] Detection loophole in asymmetric bell experiments [J].

Brunner, Nicolas ;

Gisin, Nicolas ;

Scarani, Valerio ;

Simon, Christoph .

PHYSICAL REVIEW LETTERS, 2007, 98 (22)

[7] Minimum detection efficiency for a loophole-free atom-photon bell experiment [J].

Cabello, Adan ;

Larsson, Jan-Ake .

PHYSICAL REVIEW LETTERS, 2007, 98 (22)

[8] Loophole-Free Bell Test Based on Local Precertification of Photon's Presence [J].

Cabello, Adan ;

Sciarrino, Fabio .

PHYSICAL REVIEW X, 2012, 2 (02)

[9] Comment on "Loophole-Free Bell Test for Continuous Variables via Wave and Particle Correlations" [J].

Cavalcanti, D. ;

Scarani, V. .

PHYSICAL REVIEW LETTERS, 2011, 106 (20)

[10]

Cavalcanti D, 2011, PHYS REV A, V84, DOI [10.1109/CLEOE.2011.5943443, 10.1103/PhysRevA.84.022105]

← 1 2 3 4 →