Heralded quantum steering over a high-loss channel.
Heralded quantum steering over a high-loss channel.
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DOI:
10.1126/sciadv.1701230
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发表时间:
2018-01
期刊:
影响因子:
13.6
通讯作者:
Pryde GJ
中科院分区:
文献类型:
--
作者:
Weston MM;Slussarenko S;Chrzanowski HM;Wollmann S;Shalm LK;Verma VB;Allman MS;Nam SW;Pryde GJ
Entanglement swapping enables verified nonlocal correlations over a high-loss channel with the detection loophole closed. Entanglement is the key resource for many long-range quantum information tasks, including secure communication and fundamental tests of quantum physics. These tasks require robust verification of shared entanglement, but performing it over long distances is presently technologically intractable because the loss through an optical fiber or free-space channel opens up a detection loophole. We design and experimentally demonstrate a scheme that verifies entanglement in the presence of at least 14.8 ± 0.1 dB of added loss, equivalent to approximately 80 km of telecommunication fiber. Our protocol relies on entanglement swapping to herald the presence of a photon after the lossy channel, enabling event-ready implementation of quantum steering. This result overcomes the key barrier in device-independent communication under realistic high-loss scenarios and in the realization of a quantum repeater.
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影响因子:
8.6
作者:
Shalm LK;Meyer-Scott E;Christensen BG;Bierhorst P;Wayne MA;Stevens MJ;Gerrits T;Glancy S;Hamel DR;Allman MS;Coakley KJ;Dyer SD;Hodge C;Lita AE;Verma VB;Lambrocco C;Tortorici E;Migdall AL;Zhang Y;Kumor DR;Farr WH;Marsili F;Shaw MD;Stern JA;Abellán C;Amaya W;Pruneri V;Jennewein T;Mitchell MW;Kwiat PG;Bienfang JC;Mirin RP;Knill E;Nam SW
通讯作者:
Nam SW
影响因子:
8.6
作者:
Giustina, Marissa;Versteegh, Marijn A. M.;Zeilinger, Anton
通讯作者:
Zeilinger, Anton
影响因子:
5
作者:
PEARLE, PM
通讯作者:
PEARLE, PM
影响因子:
19.6
作者:
Kocsis, S.;Xiang, G. Y.;Pryde, G. J.
通讯作者:
Pryde, G. J.
影响因子:
35
作者:
Marsili, F.;Verma, V. B.;Nam, S. W.
通讯作者:
Nam, S. W.