Crucial role of quantum entanglement in bulk properties of solids

被引：111

作者：

Brukner, C

Vedral, V

Zeilinger, A

机构：

[1] Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria

[2] Austrian Acad Sci, Inst Quantenopt & Quanteninformat, A-1090 Vienna, Austria

[3] Imperial Coll Sch Med, Blackett Lab, London SW7 2BW, England

[4] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[5] Erwin Schrodinger Inst Math Phys, A-1090 Vienna, Austria

来源：

PHYSICAL REVIEW A | 2006年 / 73卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.73.012110

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate that two well-established experimental techniques of condensed-matter physics, neutron-diffraction scattering and measurement of magnetic susceptibility, can be used to detect and quantify macroscopic entanglement in solids. Specifically, magnetic susceptibility of copper nitrate (CN) measured in 1963 cannot be described without presence of entanglement. A detailed analysis of the spin correlations in CN as obtained from neutron-scattering experiment from 2000 provides microscopic support for this interpretation and gives the value for the amount of entanglement. We present a quantitative analysis resulting in the critical temperature of 5 K in both, completely independent, experiments below which entanglement exists.

引用

页数：4

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