Entangled States of More Than 40 Atoms in an Optical Fiber Cavity

被引：150

作者：

Haas, Florian ^{[1
]}

Volz, Juergen ^{[1
]}

Gehr, Roger ^{[1
]}

Reichel, Jakob ^{[1
]}

Esteve, Jerome ^{[1
]}

机构：

[1] Univ Paris 06, Ecole Normale Super, Lab Kastler Brossel, CNRS, F-75005 Paris, France

来源：

SCIENCE | 2014年 / 344卷 / 6180期

关键词：

STANDARD QUANTUM LIMIT; PHOTONS; FIELD; CHIP;

D O I：

10.1126/science.1248905

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：

Multiparticle entanglement enables quantum simulations, quantum computing, and quantum-enhanced metrology. Yet, there are few methods to produce and measure such entanglement while maintaining single-qubit resolution as the number of qubits is scaled up. Using atom chips and fiber-optical cavities, we have developed a method based on nondestructive collective measurement and conditional evolution to create symmetric entangled states and perform their tomography. We demonstrate creation and analysis of entangled states with mean atom numbers up to 41 and experimentally prove multiparticle entanglement. Our method is independent of atom number and should allow generalization to other entangled states and other physical implementations, including circuit quantum electrodynamics.

引用

页码：180 / 183

页数：4

共 32 条

[1] Mesoscopic atomic entanglement for precision measurements beyond the standard quantum limit [J].