arXiv - PHYS - Atomic Physics最新文献

{"title":"The SWaP plot: Visualising the performance of portable atomic clocks as a function of their size, weight and power","authors":"Benjamin White, Rachel Offer, Ashby Hilton, Andre Luiten","doi":"arxiv-2409.08484","DOIUrl":"https://doi.org/arxiv-2409.08484","url":null,"abstract":"Precision timekeeping is fundamental to modern technologies such as Global\u0000Navigation Satellite Systems (GNSS), communication networks, financial\u0000transactions, and power grid management. Over the past 50 years, microwave\u0000atomic clocks have been the standard for timing precision. The new generation\u0000of optical atomic clocks have demonstrated orders of magnitude better\u0000performance, and are now transitioning from research to practical applications.\u0000We provide a web resource that tracks the performance of these optical atomic\u0000clocks, measured in terms of their Allan deviation at various integration\u0000times, against their SWaP requirements via an interactive plot. The most\u0000current data and additional resources are available online, providing a\u0000continuously updated reference for those interested in precision timing.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Simple approach for precision calculation of Bethe logarithm","authors":"San-Jiang Yang, Jing Chi, Wan-Ping Zhou, Li-Yan Tang, Zhen-Xiang Zhong, Ting-Yun Shi, Hao-Xue Qiao","doi":"arxiv-2409.08575","DOIUrl":"https://doi.org/arxiv-2409.08575","url":null,"abstract":"In this article we propose a simple approach for the precision calculation of\u0000Bethe logarithm. The leading contributions are obtained using specific\u0000operators, while the remaining terms are eliminated by adjusting the parameter\u0000$lambda$. Through the use of dimensional regularization, singular divergences\u0000are algebraically canceled. Compared to the standard form of Bethe logarithm,\u0000our approach significantly reduces the complexity of constructing pseudostates\u0000in numerical evaluations. Using this approach we obtain a very highly precise\u0000result of Bethe logarithm for the ground state of the hydrogen, achieving 49\u0000significant digits. And for multi-electron systems this approach appears\u0000simplicity and efficiency as well.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large inverse Faraday effect for Rydberg states of free atoms and isolated donors in semiconductors","authors":"Patrick J. Wong, Ivan M. Khaymovich, Gabriel Aeppli, Alexander V. Balatsky","doi":"arxiv-2409.08088","DOIUrl":"https://doi.org/arxiv-2409.08088","url":null,"abstract":"We report on the induction of magnetization in Rydberg systems by means of\u0000the inverse Faraday effect, and propose the appearance of the effect in two\u0000such systems, Rydberg atoms proper and shallow dopants in semiconductors.\u0000Rydberg atoms are characterized by a large orbital radius. This large radius\u0000gives such excited states a large angular moment, which when driven with\u0000circularly polarized light, translates to a large effective magnetic field. We\u0000calculate this effect to generate effective magnetic fields of\u0000$O(10,text{mT})timesleft( frac{omega}{1,text{THz}} right)^{-1} left(\u0000frac{I}{10,{W,cm}^{-2}} right)$ in Rydberg states of Rb and Cs for a\u0000$1,text{THz}$ beam of intensity $10,text{W},text{cm}^{-2}$. The magnitude\u0000of the effective magnetic field scales with the principal quantum number as\u0000$n^4$. Additionally, THz spectroscopy of phosphorus doped silicon reveals a\u0000large cross-section for excitation of shallow dopants to Rydberg-like states,\u0000which even for small $n$ can be driven similarly with circularly polarized\u0000light to produce even larger magnetization, with ${B}_{text{eff}}$ which we\u0000estimate as $O(1,text{mT})$ for Si:P with the same beam parameters.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"19 816 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Confinement-induced field-linked states of ultracold polar molecules","authors":"Reuben R. W. Wang, John L. Bohn","doi":"arxiv-2409.08431","DOIUrl":"https://doi.org/arxiv-2409.08431","url":null,"abstract":"We predict the existence of stable bound states between pairs of ultracold\u0000diatomic molecules with the aid of a static electric field and 1D harmonic\u0000confinement. We focus on collisions of NaK-NaK identical fermions, for which we\u0000find that currently achievable experimental parameters allow the observation of\u0000these confinement-induced field-linked bound states as scattering resonances.\u0000The bound state is highly stable with lifetimes estimated to be tens of seconds\u0000long. With the diatomic molecules bound at distances a fraction of the dipolar\u0000length scale, these complexes allow for explorations of polyatomic chemistry\u0000and Fermi gas superfluid pairing.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radii of Mirror Nuclei and Isobaric Triplets","authors":"Ben Ohayon","doi":"arxiv-2409.08193","DOIUrl":"https://doi.org/arxiv-2409.08193","url":null,"abstract":"We present a review of absolute root-mean-square charge radii of stable\u0000nuclei up to $Z=32$, which includes a previously overlooked uncertainty in the\u0000combined analysis of muonic x-ray and electron scattering experiments. From\u0000these textit{reference radii} and isotope shift measurements, we obtain those\u0000of 12 mirror pairs with a traceable and realistic uncertainty budget. The\u0000difference in radii between mirror nuclei is found to be proportional to the\u0000isospin asymmetry, confirming recent calculations by Novario emph{et al.}\u0000[PRL~130, 032501]. From the fitted proportionality constant and its\u0000uncertainty, the radii of 73 previously unknown mirror partners are predicted.\u0000These are useful e.g. for benchmarking atomic and nuclear theory, calibrating\u0000entire chains, and as an input to nuclear beta-decay calculations. The radii of\u0000$(T=1,T_z=0)$ nuclei are interpolated assuming negligible isospin symmetry\u0000breaking. This completes a model-independent, high-precision extraction of the\u0000charge and weak radii of all nuclei involved in the testing of the unitarity of\u0000the CKM matrix.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Precision spectroscopy on $^9$Be overcomes limitations from nuclear structure","authors":"Stefan DickopfMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Bastian SikoraMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Annabelle KaiserMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Marius MüllerMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Stefan UlmerInstitute for Experimental Physics, Heinrich Heine University Düsseldorf, Düsseldorf, GermanyUlmer Fundamental Symmetries Laboratory, RIKEN, Saitama, Japan, Vladimir A. YerokhinMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Zoltán HarmanMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Christoph H. KeitelMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Andreas MooserMax Planck Institute for Nuclear Physics, Heidelberg, Germany, Klaus BlaumMax Planck Institute for Nuclear Physics, Heidelberg, Germany","doi":"arxiv-2409.06306","DOIUrl":"https://doi.org/arxiv-2409.06306","url":null,"abstract":"Many powerful tests of the Standard Model of particle physics and searches\u0000for new physics with precision atomic spectroscopy are plagued by our lack of\u0000knowledge of nuclear properties. Ideally, such properties may be derived from\u0000precise measurements of the most sensitive and theoretically best-understood\u0000observables, often found in hydrogen-like systems. While these measurements are\u0000abundant for the electric properties of nuclei, they are scarce for the\u0000magnetic properties, and precise experimental results are limited to the\u0000lightest of nuclei. Here, we focus on $^9$Be which offers the unique\u0000possibility to utilize comparisons between different charge states available\u0000for high-precision spectroscopy in Penning traps to test theoretical\u0000calculations typically obscured by nuclear structure. In particular, we perform\u0000the first high-precision spectroscopy of the $1s$ hyperfine and Zeeman\u0000structure in hydrogen-like $^9$Be$^{3+}$. We determine its effective Zemach\u0000radius with an uncertainty of $500$ ppm, and its bare nuclear magnetic moment\u0000with an uncertainty of $0.6$ parts-per-billion (ppb) - uncertainties unmatched\u0000beyond hydrogen. Moreover, we compare to measurements conducted on the\u0000three-electron charge state $^9$Be$^{+}$, which, for the first time, enables\u0000testing the calculation of multi-electron diamagnetic shielding effects of the\u0000nuclear magnetic moment at the ppb level. In addition, we test quantum\u0000electrodynamics (QED) methods used for the calculation of the hyperfine\u0000splitting. Our results serve as a crucial benchmark essential for transferring\u0000high-precision results of nuclear magnetic properties across different\u0000electronic configurations.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The non-relativistic expansion of Dirac-Coulomb Hamiltonian up to $α^8$ order","authors":"Wanping Zhou, Sanjiang Yang, Haoxue Qiao","doi":"arxiv-2409.06195","DOIUrl":"https://doi.org/arxiv-2409.06195","url":null,"abstract":"This paper calculates the relativistic corrections for the Dirac-Coulomb\u0000system through the method of non-relativistic expansion. By expanding the large\u0000and small components of the Dirac wave function and the energy eigenvalues in\u0000terms of $alpha^2$ (where $alpha$ is the fine-structure constant), we obtain\u0000iterative equations for calculating the higher-order relativistic corrections\u0000of non-relativistic systems. For a single-electron system, the operator results\u0000of the iterative equations are consistent with those in the literature Ref[Zhou\u0000et al 2023 J. Phys. B At. Mol. Opt. Phys. {bf 56} 045001]. Using these\u0000iterative equations, we numerically calculate the relativistic corrections up\u0000to the order of $alpha^{20}$ for the hydrogen atom using Slater basis, which\u0000converge rapidly to the analytical results of the hydrogen atom. For the\u0000two-electron Dirac-Coulomb system, we also present iterative equations for\u0000calculating high-order energy corrections, as well as numerical energy\u0000corrections of ground state up to the order of $alpha^8$.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Double interatomic Coulombic electron capture induced by a single incident electron in two- and three-center atomic systems","authors":"L. M. Ellerbrock, A. B. Voitkiv, C. Müller","doi":"arxiv-2409.05536","DOIUrl":"https://doi.org/arxiv-2409.05536","url":null,"abstract":"In the process of interatomic Coulombic electron capture, an incident free\u0000electron is captured at an atomic center $A$ and the transition energy is\u0000transferred radiationlessly over a rather large distance to a neighboring atom\u0000$B$ of different species, upon which the latter is ionized. We consider\u0000two-step cascade processes where the electron emitted from atom $B$ is\u0000subsequently captured as well, either at center $A$ or yet another atomic\u0000center $C$, leading to emission of a second electron from one of the centers.\u0000We derive formulas for the cross section of this double interatomic Coulombic\u0000electron capture and discuss the relevance of this process, which leads to a\u0000substantial rearrangement of the electronic configuration, in various two- and\u0000three-center atomic systems.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of radiatively open systems using an optical cavity","authors":"V. I. Gokul, Arun Bahuleyan, Raghuveer Singh Yadav, S. P. Dinesh, V. R. Thakar, Rahul Sawant, S. A. Rangwala","doi":"arxiv-2409.05451","DOIUrl":"https://doi.org/arxiv-2409.05451","url":null,"abstract":"We experimentally demonstrate a cavity-based detection scheme for a cold\u0000atomic ensemble with a radiatively open transition. Our method exploits the\u0000collective strong coupling of atoms to the cavity mode, which results in\u0000off-resonant probing of the atomic ensemble, leading to a dramatic reduction in\u0000losses from the detection cycle. We then show the viability of this frequency\u0000measurement for detecting a small number of atoms and molecules by theoretical\u0000modelling. Compared with the most commonly used fluorescence method, we show\u0000that the cavity-based scheme allows rapid and prolonged detection of the\u0000system's evolution with minimal destruction.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamics of Spin-Imbalanced Fermi Gases with SU(N) Symmetric Interaction","authors":"Chengdong He, Xin-Yuan Gao, Ka Kwan Pak, Yu-Jun Liu, Peng Ren, Mengbo Guo, Entong Zhao, Yangqian Yan, Gyu-Boong Jo","doi":"arxiv-2409.04960","DOIUrl":"https://doi.org/arxiv-2409.04960","url":null,"abstract":"Thermodynamics of degenerate Fermi gases has been extensively studied through\u0000various aspects such as Pauli blocking effects, collective modes, BCS\u0000superfluidity, and more. Despite this, multi-component fermions with imbalanced\u0000spin configurations remain largely unexplored, particularly beyond the\u0000two-component scenario. In this work, we generalize the thermodynamic study of\u0000SU($N$) fermions to spin-imbalanced configurations based on density\u0000fluctuations. Theoretically, we provide closed-form expressions of density\u0000fluctuation across all temperature ranges for general spin population setups.\u0000Experimentally, after calibrating the measurements with deeply degenerate\u0000$^{173}$Yb Fermi gases under spin-balanced configurations ($Nleq$~6), we\u0000examine the density fluctuations in spin-imbalanced systems. Specifically, we\u0000investigate two-species and four-species configurations to validate our\u0000theoretical predictions. Our analysis indicates that interaction enhancement\u0000effects can be significant even in highly spin-imbalanced systems. Finally, as\u0000an application, we use this approach to examine the decoherence process. Our\u0000study provides a deeper understanding of the thermodynamic features of\u0000spin-imbalanced multi-component Fermi gases and opens new avenues for exploring\u0000complex quantum many-body systems.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}