首页/论文/physics/9811044

arXiv physics/98110441998-11-25physics.atom-ph

金和<$原子中电子电偶极矩的增强因子

Enhancement factor for the electron electric dipole moment in francium and gold atoms

T. M. R. Byrnes, V. A. Dzuba, V. V. Flambaum, D. W. Murray

备注：: 6 pages, no figures, uses RevTex, reference added
发表信息：: Phys. Rev. A 59, 3082 (1999)
DOI：: 10.1103/PhysRevA.59.3082

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

摘要英文摘要相关论文

摘要：

如果电子具有电偶极矩（EDM），它们将诱导原子的EDM。对于特定原子，原子EDM与电子EDM的比率称为增强因子R。我们计算了Francium和Au原子的增强因子，结果Fr为910 ± 5%，Au为260 ± 15%。这些增强因子的大值使得这些原子对电子EDM测量具有吸引力，因此对时间反演不变性破坏的搜索具有吸引力。

英文摘要：

If electrons had an electric dipole moment (EDM) they would induce EDMs of atoms. The ratio of the atomic EDM to the electron EDM for a particular atom is called the enhancement factor, R. We calculate the enhancement factor for the francium and gold atoms, with the results 910 plus/minus 5% for Fr and 260 plus/minus 15% for Au. The large values of these enhancement factors make these atoms attractive for electron EDM measurements, and hence the search for time-reversal invariance violation.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

摘要英文摘要相关论文

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

继续探索

相关论文

Static electric dipole moment of the francium atom induced by axionlike particle exchange

The francium atom is considered as a prospective candidate system to search for the T,P-violating electron electric dipole moment [T. Aoki et al Quantum Sci. Technol. 6, 044008 (2021)]. We demonstrate that the same experiment can be used for axionlike particles (ALP) search. For this, we calculate electronic structure constants of ALP-mediated interaction for a wide range of ALP masses. Using the recently updated constraints on the ALP-electron and ALP-nucleon coupling constants, we show that the contribution of considered interactions corresponding to these constraints can give significant co…

2022-03-16hep-phphysics.atom-phphysics.chem-ph

Magic and tune-out wavelengths for atomic francium

The frequency dependent polarizabilities of the francium atom are calculated from the available data of energy levels and transition rates. Magic wavelengths for the state insensitive optical dipole trapping are identified from the calculated light shifts of the $7s~^2S_{1/2}$, $7p~^2P_{1/2, 3/2}$ and $8s~^{2}S_{1/2}$ levels of the $7s~^{2}S_{1/2}-7p~^{2}P_{1/2,3/2}$ and $7s~^{2}S_{1/2}-8s~^{2}S_{1/2}$ transitions, respectively. Wavelengths in the ultraviolet, visible and near infrared region is identified that are suitable for cooling and trapping. Magic wavelengths between 600-700~nm and 700…

2016-03-25physics.atom-ph

Isotope Shifts in the 7s$\rightarrow$8s Transition of Francium: Measurements and Comparison to \textit{ab initio} Theory

We observe the electric-dipole forbidden $7s\rightarrow8s$ transition in the francium isotopes $^{208-211}$Fr and $^{213}$Fr using a two-photon excitation scheme. We collect the atoms online from an accelerator and confine them in a magneto optical trap for the measurements. In combination with previous measurements of the $7s\rightarrow7p_{1/2}$ transition we perform a King Plot analysis. We compare the thus determined ratio of the field shift constants (1.230 $\pm$ 0.019) to results obtained from new ab initio calculations (1.234 $\pm$ 0.010) and find excellent agreement.

2017-10-20physics.atom-ph

Preliminary studies for anapole moment measurements in rubidium and francium

Preparations for the anapole measurement in Fr indicate the possibility of performing a similar measurement in a chain of Rb. The sensitivity analysis based on a single nucleon model shows the potential for placing strong limits on the nucleon weak interaction parameters. There are values of the magnetic fields at much lower values than found before that are insensitive to first order changes in the field. The anapole moment effect in Rb corresponds to an equivalent electric field that is eighty times smaller than Fr, but the stability of the isotopes and the current performance of the dipole …

2010-01-06physics.atom-ph

Study of the scalar-pseudoscalar interaction in the francium atom

Fr atom can be successively used to search for the atomic permanent electric dipole moment (EDM) [Hyperfine Interactions 236, 53 (2015); Journal of Physics: Conference Series 691, 012017 (2016)]. It can be induced by the permanent electron EDM predicted by modern extensions of the standard model to be nonzero at the level accessible by the new generation of EDM experiments. We consider another mechanism of the atomic EDM generation in Fr. This is caused by the scalar-pseudoscalar nucleus-electron neutral current interaction with the dimensionless strength constant, $k_{T,P}$. Similar to the el…

2017-02-16physics.atom-phphysics.chem-ph

laser囚禁碱金属原子的原子核反极矩测量方法

Measurement method for the nuclear anapole moment of laser trapped alkali atoms

原子核内的弱相互作用产生一个违反电磁矩的依赖于原子核自旋的宇称。在重核中，阿那普尔矩是自旋相关原子宇称破坏的主要贡献。分析了一种通过超精细基态间的电偶极跃迁测量原子核的再极点矩的方法。该方法需要严格限制的原子，将它们定位在一个驻波的腹驱动的anapole诱导的E1跃迁。我们探讨了必要的限制，在原子的数量，激发场，陷阱类型，询问方法，和必要的系统测试，这样的测量，最重的碱。

2007-01-22physics.atom-ph

更多相关论文收起更多论文

A robust limit for the electric dipole moment of the electron

Electric dipole moments constitute a competitive method to search for new physics, being particularly sensitive to new CP-violating phases. Given the experimental and theoretical progress in this field and more generally in particle physics, the necessity for more reliable bounds than the ones usually employed emerges. We therefore propose an improved extraction of the electric dipole moment of the electron and the relevant coefficient of the electron-nucleon coupling, taking into account theoretical uncertainties and possible cancellations, to be used in model-dependent analyses. Specifically…

2013-01-22hep-phphysics.atom-ph

含金分子中的光学循环与对电子电偶极矩的敏感性

Optical Cycling and Sensitivity to the Electron's Electric Dipole Moment in Gold-Containing Molecules

本文提出AuX（X=C, Si, Ge, Sn, Pb）双原子分子可用于光学循环与精密测量，其具有激光可及跃迁、易极化基态及对电子电偶极矩的高敏感性，有望显著提升对时间反演对称性破坏的搜寻。

2024-07-28physics.atom-phphysics.chem-ph

CsAg、FrLi 和 FrAg 分子中的半强子电荷-宇称破坏相互作用常数

Semi-Hadronic Charge-Parity Violation Interaction Constants in CsAg, FrLi and FrAg molecules

本文系统研究了下一代寻找电荷-宇称破坏源的候选分子中的核子-电子张量-赝张量相互作用，发现在 FrAg 分子中该相互作用常数较大，能极大约束超出标准模型的基本参数，是极佳的探针。

2024-10-17hep-phphysics.atom-phquant-ph

允许和宇称非守恒电偶极跃迁振幅的随机相位近似及其与多体微扰理论和耦合集团理论的联系

Random Phase Approximation For allowed and Parity Non-conserving Electric Dipole Transition Amplitudes and its connection with Many-Body Perturbation Theory and Coupled Cluster Theory

探讨了无规相近似（RPA）与多体微扰理论（MBPT）及其全阶推广的耦合团簇理论（CCT）之间的联系。导出了宇称非守恒中性弱相互作用引起的允许跃迁和禁戒跃迁的电偶极振幅的显式表达式。与RPA项在这两种情况下的戈德斯通图中示出出现在MBPT和CCT和允许的电偶极跃迁的这种关系的数值验证。

2005-11-28physics.atom-ph

EUV magnetic-dipole lines from highly-charged high-Z ions with an open 3d shell

The electron beam ion trap (EBIT) at the National Institute of Standards and Technology was used to produce highly-charged ions of hafnium, tantalum and gold with an open 3d shell. The extreme-ultraviolet (EUV) spectra from these ions were recorded with a flat-field grazing-incidence spectrometer in the wavelength range of 4.5 nm to 25 nm. A total of 133 new spectral lines, primarily due to magnetic-dipole transitions within the ground-state $3d^n$ configurations of the Co-like to K-like ions, were identified by comparing energy-dependent experimental spectra with a detailed collisional-radiat…

2012-12-08physics.atom-ph

Application of the Finite Field Coupled Cluster Method to Calculate Molecular Properties Relevant to Electron Electric Dipole Moment Searches

Heavy polar diatomic molecules are currently among the most promising probes of fundamental physics. Constraining the electric dipole moment of the electron (eEDM), in order to explore physics beyond the Standard Model, requires a synergy of molecular experiment and theory. Recent advances in experiment in this field have motivated us to implement a finite field coupled cluster approach (FFCC). This work has distinct advantages over the theoretical methods that we had used earlier in the analysis of eEDM searches. We used the relativistic FFCC to calculate molecular properties of interest to e…

2018-04-10physics.atom-ph

QED calculation of the dipole polarizability of helium atom

The QED contribution to the dipole polarizability of the $^4$He atom was computed, including the effect of finite nuclear mass. The computationally most challenging contribution of the second electric-field derivative of the Bethe logarithm was obtained using two different methods: the integral representation method of Schwartz and the sum-over-states approach of Goldman and Drake. The results of both calculations are consistent, although the former method turned out to be much more accurate. The obtained value of the electric-field derivative of the Bethe logarithm, equal to $0.048\,557\,2(14…

2020-02-25physics.atom-ph

一维平面衍射微结构实现的全光原子表面陷阱

All-optical atom surface traps implemented with one-dimensional planar diffractive microstructures

我们描述了负载，包容性和光学性质的全光原子陷阱实现衍射聚焦与一维（1D）微结构的金膜上铣削。这些具有几百微米量级的焦距的片上菲涅耳透镜产生光学梯度偶极阱。冷原子从位于金镜表面上方几百微米处的镜面磁光阱（MMOT）加载。详细的加载优化的报告和前景，这些结构的未来发展进行了讨论。

2006-11-09physics.atom-phphysics.optics

Investigating properties of Cl$^-$ and Au$^-$ ions using relativistic many-body methods

We investigate ground state properties of singly charged chlorine (Cl$^-$) and gold (Au$^-$) negative ions by employing four-component relativistic many-body methods. In our approach, we attach an electron to the respective outer orbitals of chlorine (Cl) and gold (Au) atoms to determine the Dirac-Fock (DF) wave functions of the ground state configurations of Cl$^-$ and Au$^-$, respectively. As a result, all the single-particle orbitals see the correlation effects due to the appended electron of the negative ion. After obtaining the DF wave functions, lower-order many-body perturbation methods…

2021-01-06physics.atom-phphysics.chem-phphysics.comp-ph