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Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks

文献类型：期刊论文

作者Hankin, A. M.2,4,5; Clements, E. R.4,5; Huang, Y.3; Brewer, S. M.4,5; Chen, J-S1,4,5; Chou, C. W.5; Hume, D. B.5; Leibrandt, D. R.4,5
刊名PHYSICAL REVIEW A
出版日期2019-09-30
卷号100期号:3页码:12
ISSN号2469-9926
DOI10.1103/PhysRevA.100.033419
英文摘要We describe a framework for calculating the frequency shift and uncertainty of trapped-ion optical atomic clocks caused by background-gas collisions, and apply this framework to an Al-27(+) clock to enable a total fractional systematic uncertainty below 10(-18). For this clock, with 38(19) nPa of room-temperature H-2 background gas, we find that collisional heating generates a non-thermal distribution of motional states with a mean time-dilation shift of order 10(-16) at the end of a 150 ms probe, which is not detected by sideband thermometry energy measurements. However, the contribution of collisional heating to the spectroscopy signal is highly suppressed and we calculate the BGC shift to be -0.6(2.4) x 10(-19), where the shift is due to collisional heating time dilation and the uncertainty is dominated by the worst case +/-pi/2 bound used for collisional phase shift of the Al-27(+) superposition state. We experimentally validate the framework and determine the background-gas pressure in situ using measurements of the rate of collisions that cause reordering of mixed-species ion pairs.
WOS关键词STANDARD ; ATOM
资助项目Defense Advanced Research Projects Agency ; National Institute of Standards and Technology ; Office of Naval Research ; U.S. Army Research Office through MURI[W911NF-11-1-0400]
WOS研究方向Optics ; Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000488249400007
资助机构Defense Advanced Research Projects Agency ; Defense Advanced Research Projects Agency ; National Institute of Standards and Technology ; National Institute of Standards and Technology ; Office of Naval Research ; Office of Naval Research ; U.S. Army Research Office through MURI ; U.S. Army Research Office through MURI ; Defense Advanced Research Projects Agency ; Defense Advanced Research Projects Agency ; National Institute of Standards and Technology ; National Institute of Standards and Technology ; Office of Naval Research ; Office of Naval Research ; U.S. Army Research Office through MURI ; U.S. Army Research Office through MURI ; Defense Advanced Research Projects Agency ; Defense Advanced Research Projects Agency ; National Institute of Standards and Technology ; National Institute of Standards and Technology ; Office of Naval Research ; Office of Naval Research ; U.S. Army Research Office through MURI ; U.S. Army Research Office through MURI ; Defense Advanced Research Projects Agency ; Defense Advanced Research Projects Agency ; National Institute of Standards and Technology ; National Institute of Standards and Technology ; Office of Naval Research ; Office of Naval Research ; U.S. Army Research Office through MURI ; U.S. Army Research Office through MURI
源URL[http://ir.wipm.ac.cn/handle/112942/21367]  
专题中国科学院武汉物理与数学研究所
通讯作者Leibrandt, D. R.
作者单位1.IonQ Inc, College Pk, MD 20740 USA
2.Honeywell Quantum Solut, Broomfield, CO 80021 USA
3.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Hubei, Peoples R China
4.Univ Colorado, Dept Phys, Boulder, CO 80309 USA
5.NIST, Time & Frequency Div, Boulder, CO 80305 USA
推荐引用方式
GB/T 7714		 Hankin, A. M.,Clements, E. R.,Huang, Y.,et al. Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks[J]. PHYSICAL REVIEW A,2019,100(3):12.
APA Hankin, A. M..,Clements, E. R..,Huang, Y..,Brewer, S. M..,Chen, J-S.,...&Leibrandt, D. R..(2019).Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks.PHYSICAL REVIEW A,100(3),12.
MLA Hankin, A. M.,et al."Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks".PHYSICAL REVIEW A 100.3(2019):12.

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来源：武汉物理与数学研究所

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