arXiv: Atomic Physics最新文献

A liquid nitrogen-cooled Ca+ optical clock with systematic uncertainty of 3×10-18 一种系统不确定度为3×10-18的液氮冷却Ca+光钟

arXiv: Atomic Physics Pub Date : 2021-03-16 DOI: 10.21203/RS.3.RS-333884/V1

Yao Huang, Baolin Zhang, Mengyan Zeng, Yanmei Hao, Huaqing Zhang, H. Guan, Zheng Chen, Miao Wang, K. Gao

{"title":"A liquid nitrogen-cooled Ca+ optical clock with systematic uncertainty of 3×10-18","authors":"Yao Huang, Baolin Zhang, Mengyan Zeng, Yanmei Hao, Huaqing Zhang, H. Guan, Zheng Chen, Miao Wang, K. Gao","doi":"10.21203/RS.3.RS-333884/V1","DOIUrl":"https://doi.org/10.21203/RS.3.RS-333884/V1","url":null,"abstract":"Here we present a liquid nitrogen-cooled Ca+ optical clock with an overall systematic uncertainty of 3×10-18. In contrast with the room-temperature Ca+ optical clock that we have reported previously, the temperature of the blackbody radiation (BBR) shield in vacuum has been reduced to 82(5) K using liquid nitrogen. An ion trap with a lower heating rate and improved cooling lasers were also introduced. This allows cooling the ion temperature to the Doppler cooling limit during the clock operation, and the systematic uncertainty due to the ion’s secular (thermal) motion is reduced to < 1×10-18. The uncertainty due to the probe laser light shift and the servo error are also reduced to < 1×10-19 and 4×10-19 with the hyper-Ramsey method and the higher-order servo algorithm, respectively. By comparing the output frequency of the cryogenic clock to that of a room-temperature clock, the differential BBR shift between the two was measured with a fractional statistical uncertainty of 7×10-18. The differential BBR shift was used to calculate the static differential polarizability, and it was found in excellent agreement with our previous measurement with a different method. This work suggests that the BBR shift of optical clocks can be well suppressed in a liquid nitrogen environment. This is advantageous because conventional liquid-helium cryogenic systems for optical clocks are more expensive and complicated. Moreover, the proposed system can be used to suppress the BBR shift significantly in other types of optical clocks such as Yb+, Sr+, Yb, Sr, etc.","PeriodicalId":8441,"journal":{"name":"arXiv: Atomic Physics","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82616569","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}

引用次数: 15

In Situ Sub-50-Attosecond Active Stabilization of the Delay Between Infrared and Extreme-Ultraviolet Light Pulses 红外和极紫外光脉冲之间延迟的50阿秒以下的原位主动稳定

arXiv: Atomic Physics Pub Date : 2020-12-17 DOI: 10.1103/PHYSREVAPPLIED.15.034036

M. Luttmann, D. Bresteau, J. Hergott, O. Tcherbakoff, T. Ruchon

{"title":"In Situ\u0000 Sub-50-Attosecond Active Stabilization of the Delay Between Infrared and Extreme-Ultraviolet Light Pulses","authors":"M. Luttmann, D. Bresteau, J. Hergott, O. Tcherbakoff, T. Ruchon","doi":"10.1103/PHYSREVAPPLIED.15.034036","DOIUrl":"https://doi.org/10.1103/PHYSREVAPPLIED.15.034036","url":null,"abstract":"The blooming of attosecond science (1 as = $10^{-18}$ s) has raised the need to exquisitely control the delay between two ultrashort light pulses, one of them being intense and in the visible spectral range, while the second is weak and in the Extreme Ultra-Violet spectral range. Here we introduce a robust technique, named LIZARD (Laser-dressed IoniZation for the Adjustment of the pump-pRobe Delay), allowing an active stabilization of this pump-probe delay. The originality of the method lies in an error signal calculated from a two-photon photoelectron signal obtained by photoionizing a gas target in an electronic spectrometer with the two superimposed beams. The modulation of sidebands in phase quadrature allows us to perform an textit{in situ} measurement of the pump-probe phase, and to compensate for fluctuations with an uniform noise sensitivity over a large range of delays. Despite an interferometer length of several meters, we achieved a long term stability of 28 as RMS over hours. This method could be applied to the stabilization of other types of two-color interferometers, provided that one of the propagating beams is capable of photoionizing a target.","PeriodicalId":8441,"journal":{"name":"arXiv: Atomic Physics","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72732697","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}

引用次数: 2

Laser spectroscopy of the 2S1/2 - 2P1/2, 2P3/2 transitions in stored and cooled relativistic C3+ ions 储存和冷却的相对论性C3+离子中2S1/2 - 2P1/2、2P3/2跃迁的激光光谱

arXiv: Atomic Physics Pub Date : 2020-12-17 DOI: 10.21203/RS.3.RS-117322/V1

D. Winzen, V. Hannen, M. Bussmann, A. Buß, C. Egelkamp, L. Eidam, Zhongkui Huang, D. Kiefer, S. Klammes, T. Kuhl, M. Loeser, Xinwen Ma, W. Nörtershäuser, H. Ortjohann, R. Sánchez, M. Siebold, T. Stöhlker, J. Ullmann, J. Vollbrecht, T. Walther, H. Wang, C. Weinheimer, D. Winters

引用次数: 0

High-Resolution Imaging of Cold Atoms through a Multimode Fiber 通过多模光纤的高分辨率冷原子成像

arXiv: Atomic Physics Pub Date : 2020-12-16 DOI: 10.1103/PhysRevApplied.15.064047

Nicolas Vitrant, S. Garcia, K. Müller, A. Ourjoumtsev

引用次数: 2

Bistable optical transmission through arrays of atoms in free space 通过自由空间中原子阵列的双稳光传输

arXiv: Atomic Physics Pub Date : 2020-12-15 DOI: 10.1103/PHYSREVA.103.033706

C. Parmee, J. Ruostekoski

引用次数: 11

Towards the complete phase profiling of attosecond wave packets 迈向阿秒波包的完整相位分析

arXiv: Atomic Physics Pub Date : 2020-12-14 DOI: 10.1103/PHYSREVRESEARCH.3.013195

J. Fuchs, N. Douguet, S. Donsa, F. Martín, J. Burgdörfer, L. Argenti, L. Cattaneo, U. Keller