Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement

被引：137

作者：

Fernholz, T. ^{[1
]}

Krauter, H. ^{[1
]}

Jensen, K. ^{[1
]}

Sherson, J. F. ^{[1
]}

Sorensen, A. S. ^{[1
]}

Polzik, E. S. ^{[1
]}

机构：

[1] Univ Copenhagen, Niels Bohr Inst, Danish Natl Res Fdn Ctr Quantum Opt, QUANTOP, DK-2100 Copenhagen, Denmark

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.073601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate spin squeezing in a room temperature ensemble of approximate to 10(12) cesium atoms using their internal structure, where the necessary entanglement is created between nuclear and electronic spins of each individual atom. This state provides improvement in measurement sensitivity beyond the standard quantum limit for quantum memory experiments and applications in quantum metrology and is thus a complementary alternative to spin squeezing obtained via interatom entanglement. Squeezing of the collective spin is verified by quantum state tomography.

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页数：4

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