Atomic spin decoherence near conducting and superconducting films

被引：53

作者：

Scheel, S ^{[1
]}

Rekdal, PK ^{[1
]}

Knight, PL ^{[1
]}

Hinds, EA ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England

来源：

PHYSICAL REVIEW A | 2005年 / 72卷 / 04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/PhysRevA.72.042901

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We derive scaling laws for the spin decoherence of neutral atoms trapped near conducting and superconducting plane surfaces. A result for thin films sheds light on the measurement of Y. J. Lin, I. Teper, C. Chin, and V. Vuletic [Phys. Rev. Lett. 92, 050404 (2004)]. Our calculation is based on a quantum-theoretical treatment of electromagnetic radiation near metallic bodies [P. K. Rekdal, S. Scheel, P. L. Knight, and E. A. Hinds, Phys. Rev. A 70, 013811 (2004)]. We show that there is a critical atom-surface distance that maximizes the spin relaxation rate and we show how this depends on the skin depth and thickness of the metal surface. In the light of this impedance-matching effect we discuss the spin relaxation to be expected above a thin superconducting niobium layer.

引用

页数：4

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