Conclusive quantum steering with superconducting transition-edge sensors

被引：208

作者：

Smith, Devin H. ^{[1
,2
,3
]}

Gillett, Geoff ^{[1
,2
,3
]}

de Almeida, Marcelo P. ^{[1
,2
,3
]}

Branciard, Cyril ^{[3
]}

Fedrizzi, Alessandro ^{[1
,2
,3
]}

Weinhold, Till J. ^{[1
,2
,3
]}

Lita, Adriana ^{[4
]}

Calkins, Brice ^{[4
]}

Gerrits, Thomas ^{[4
]}

Wiseman, Howard M. ^{[5
]}

Nam, Sae Woo ^{[4
]}

White, Andrew G. ^{[1
,2
,3
]}

机构：

[1] Univ Queensland, Ctr Engn Quantum Syst, Brisbane, Qld 4072, Australia

[2] Univ Queensland, Ctr Quantum Computat & Commun Technol, Australian Res Council, Brisbane, Qld 4072, Australia

[3] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[4] Natl Inst Stand & Technol, Boulder, CO 80305 USA

[5] Griffith Univ, Ctr Quantum Computat & Commun Technol, Australian Res Council, Ctr Quantum Dynam, Brisbane, Qld 4111, Australia

来源：

NATURE COMMUNICATIONS | 2012年 / 3卷

基金：

澳大利亚研究理事会;

关键词：

CURRENT SITUATION; BELLS-INEQUALITY; VIOLATION; ENTANGLEMENT;

D O I：

10.1038/ncomms1628

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Quantum steering allows two parties to verify shared entanglement even if one measurement device is untrusted. A conclusive demonstration of steering through the violation of a steering inequality is of considerable fundamental interest and opens up applications in quantum communication. To date, all experimental tests with single-photon states have relied on post selection, allowing untrusted devices to cheat by hiding unfavourable events in losses. Here we close this 'detection loophole' by combining a highly efficient source of entangled photon pairs with superconducting transition-edge sensors. We achieve an unprecedented similar to 62% conditional detection efficiency of entangled photons and violate a steering inequality with the minimal number of measurement settings by 48 s.d.s. Our results provide a clear path to practical applications of steering and to a photonic loophole-free Bell test.

引用

页数：6

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