Toward Heisenberg-limited spectroscopy with multiparticle entangled states

被引：523

作者：

Leibfried, D ^{[1
]}

Barrett, MD ^{[1
]}

Schaetz, T ^{[1
]}

Britton, J ^{[1
]}

Chiaverini, J ^{[1
]}

Itano, WM ^{[1
]}

Jost, JD ^{[1
]}

Langer, C ^{[1
]}

Wineland, DJ ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Boulder, CO 80305 USA

来源：

SCIENCE | 2004年 / 304卷 / 5676期

关键词：

D O I：

10.1126/science.1097576

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：

The precision in spectroscopy of any quantum system is fundamentally limited by the Heisenberg uncertainty relation for energy and time. For N systems, this limit requires that they be in a quantum-mechanically entangled state. We describe a scalable method of spectroscopy that can potentially take full advantage of entanglement to reach the Heisenberg limit and has the practical advantage that the spectroscopic information is transferred to states with optimal protection against readout noise. We demonstrate our method experimentally with three beryllium ions. The spectroscopic sensitivity attained is 1.45(2) times as high as that of a perfect experiment with three non-entangled particles.

引用

页码：1476 / 1478

页数：3

共 28 条

[11] QUANTUM PROJECTION NOISE - POPULATION FLUCTUATIONS IN 2-LEVEL SYSTEMS [J].