Experimental Demonstration of the Stability of Berry's Phase for a Spin-1/2 Particle

被引：116

作者：

Filipp, S. ^{[1
,2
,3
]}

Klepp, J. ^{[1
,3
]}

Hasegawa, Y. ^{[1
]}

Plonka-Spehr, C. ^{[3
]}

Schmidt, U. ^{[4
]}

Geltenbort, P. ^{[3
]}

Rauch, H. ^{[1
]}

机构：

[1] Osterreich Univ, Atominst, A-1020 Vienna, Austria

[2] ETH, Dept Phys, CH-8093 Zurich, Switzerland

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[4] Inst Phys, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 03期

基金：

日本科学技术振兴机构;

关键词：

GEOMETRIC PHASES; QUANTUM;

D O I：

10.1103/PhysRevLett.102.030404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The geometric phase has been proposed as a candidate for noise resilient coherent manipulation of fragile quantum systems. Since it is determined only by the path of the quantum state, the presence of noise fluctuations affects the geometric phase in a different way than the dynamical phase. We have experimentally tested the robustness of Berry's geometric phase for spin-1/2 particles in a cyclically varying magnetic field. Using trapped polarized ultracold neutrons, it is demonstrated that the geometric phase contributions to dephasing due to adiabatic field fluctuations vanish for long evolution times.

引用

页数：4

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