Generation of Macroscopic Singlet States in a Cold Atomic Ensemble

被引：55

作者：

Behbood, N. ^{[1
]}

Martin Ciurana, F. ^{[1
]}

Colangelo, G. ^{[1
]}

Napolitano, M. ^{[1
]}

Toth, Geza ^{[2
,3
,4
]}

Sewell, R. J. ^{[1
]}

Mitchell, M. W. ^{[1
,5
]}

机构：

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

[2] Univ Basque Country UPV EHU, Dept Theoret Phys, E-48080 Bilbao, Spain

[3] Basque Fdn Sci, Ikerbasque, E-48011 Bilbao, Spain

[4] Hungarian Acad Sci, Wigner Res Ctr Phys, H-1525 Budapest, Hungary

[5] ICREA Inst Catalana Rec & Estudis Avancats, Barcelona 08015, Spain

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 09期

关键词：

OPTICAL LATTICE; QUANTUM; MAGNETISM;

D O I：

10.1103/PhysRevLett.113.093601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the generation of a macroscopic singlet state in a cold atomic sample via quantum nondemolition measurement-induced spin squeezing. We observe 3 dB of spin squeezing and detect entanglement with 5 sigma statistical significance using a generalized spin-squeezing inequality. The degree of squeezing implies at least 50% of the atoms have formed singlets.

引用

页数：5

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