黑体辐射位移与对原子钟研究的理论贡献。

Black-body radiation shifts and theoretical contributions to atomic clock research.

机构信息

Department of Physics and Astronomy, University of Delaware, Newark, DE, USA.

出版信息

IEEE Trans Ultrason Ferroelectr Freq Control. 2010 Jan;57(1):94-105. doi: 10.1109/TUFFC.2010.1384.

DOI:10.1109/TUFFC.2010.1384

PMID:20040432

Abstract

A review of theoretical calculations of black-body radiation (BBR) shifts in various systems of interest to atomic clock research is presented. Calculations for monovalent systems, such as Ca(+), Sr(+), and Rb are carried out using a relativistic all-order single-double method, where all single and double excitations of the Dirac-Fock wave function are included to all orders of perturbation theory. A recently developed method for accurate calculations of BBR shifts in divalent atoms such as Sr is discussed. This approach combines the relativistic allorder method and the configuration interaction method. The evaluation of uncertainties in theoretical values of BBR shifts is discussed in detail.

摘要

本文回顾了各种对原子钟研究有意义的系统中黑体辐射（BBR）频移的理论计算。使用相对论全阶单双方法对单价系统（如 Ca(+), Sr(+), 和 Rb）进行了计算，其中包括对狄拉克-福克波函数的所有单激发和双激发，以及所有阶数的微扰理论。还讨论了一种最近开发的用于准确计算如 Sr 等二价原子 BBR 频移的方法。该方法结合了相对论全阶方法和组态相互作用方法。详细讨论了 BBR 频移理论值不确定度的评估。