Revisiting 129Xe electric dipole moment measurements applying a new global phase fitting approach

被引：4

作者：

Liu, Tianhao ^{[1
,2
,3
]}

Rolfs, Katharina ^{[1
]}

Fan, Isaac ^{[1
]}

Haude, Sophia ^{[1
]}

Kilian, Wolfgang ^{[1
]}

Li, Liyi ^{[2
]}

Schnabel, Allard ^{[1
]}

Voigt, Jens ^{[1
]}

Trahms, Lutz ^{[1
]}

机构：

[1] Phys Tech Bundesanstalt PTB, Abbestr 2-12, D-10587 Berlin, Germany

[2] Harbin Inst Technol, Dept Elect Engn & Automat, Harbin 150001, Peoples R China

[3] Johannes Gutenberg Univ Mainz, D-55128 Mainz, Germany

来源：

NEW JOURNAL OF PHYSICS | 2021年 / 23卷 / 06期

基金：

中国国家自然科学基金;

关键词：

electric dipole moment; data analysis; quantum measurement; Monte-Carlo analysis; CP-violation; LEAST-SQUARES; VIOLATION; SEARCH;

D O I：

10.1088/1367-2630/ac09ca

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By measuring the spin precession frequencies of polarized Xe-129 and He-3, a new upper limit on the Xe-129 atomic electric dipole moment (EDM) d(A) (Xe-129) was reported in Sachdev et al (2019 Phys. Rev. Lett. 123, 143003). Here, we propose a new evaluation method based on global phase fitting (GPF) for analyzing the continuous phase development of the He-3-Xe-129 comagnetometer signal. The Cramer-Rao lower bound on the Xe-129 EDMfor the GPF method is theoretically derived and shows the potential benefit of our new approach. The robustness of the GPF method is verified with Monte-Carlo studies. By optimizing the analysis parameters and adding data that could not be analyzed with the former method, we obtain a result of d(A) (Xe-129) = [1.1 +/- 3.6 (stat) +/- 2.0 (syst)] x 10(-28) e cm in an unblinded analysis. For the systematic uncertainty analyses, we adopted all methods from the aforementioned PRL publication except the comagnetometer phase drift, which can be omitted using the GPF method. The updated null result can be interpreted as a new upper limit of vertical bar d(A) (Xe-129)vertical bar < 8.3 x 10(-28) e cm at the 95% C.L.

引用

页数：17

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