Optical clocks based on the 
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 ions

Porsev, S. G.; Safronova, U. I.; Safronova, M. S.; Schmidt, Piet O.; Bondarev, A. I.; Kozlov, M. G.; Tupitsyn, I. I.; Cheung, Charles

doi:10.1103/physreva.102.012802

Cited by 39 publications

(15 citation statements)

References 47 publications

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“…All calculations are performed using either Dirac-Coulomb, or Dirac-Coulomb-Breit Hamiltonians. Breit corrections are taken into account beyond the Gaunt term [22,23].…”

Section: Calculation Resultsmentioning

confidence: 99%

Atomic calculations of hyperfine structure anomaly in gold

Demidov,

Konovalova,

Imanbaeva

et al. 2020

Preprint

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“…All calculations are performed using either Dirac-Coulomb, or Dirac-Coulomb-Breit Hamiltonians. Breit corrections are taken into account beyond the Gaunt term [22,23].…”

Section: Calculation Resultsmentioning

confidence: 99%

Atomic calculations of hyperfine structure anomaly in gold

Demidov,

Konovalova,

Imanbaeva

et al. 2020

Preprint

Self Cite

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“…To the best of our knowledge, only two high-precision benchmarks exists for any of the properties involving quadrupole matrix elements for systems with more than one valence electron [12,13], neither of which involve quadrupole moment measurements. Present measurements directly demonstrate the validity of the theory and the corresponding evaluation of uncertainties in the calculated quadrupole moments, essential for guiding future experiments with highly charged ions and other systems [14].…”

Section: Introductionmentioning

confidence: 58%

Precision measurement of the $^3D_1$ and $^3D_2$ quadrupole moments in Lu$^+$

Kaewuam,

Tan,

Zhang

et al. 2020

Preprint

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Precision measurements of the Lu + 3 D1 and 3 D2 quadrupole moments have been carried out giving Θ( 3 D1) = 0.63862(74) ea 2 0 and Θ( 3 D2) = 0.8602( 14) ea 2 0 , respectively. The measurements utilize the differential shift between ions in a multi-ion crystal so that effects of external field gradients do not contribute leaving only the well defined Coulomb interaction. At this level of precision, hyperfinemediated corrections will likely be important.

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“…The methods and codes developed in this work have also been utilized in various other calculations involving HCI, neutral atoms and negative ions. Recent works include exploring the development of optical clocks using highly charged Cf 15+ and Cf 17+ ions [37], predicting the lowest-lying odd-parity energy levels in neutral actinium [38], predicting quasibound states of negatively charged La − [39], and calculating E2 transition properties of Bi − [40].…”

Section: Other Applicationsmentioning

confidence: 99%

Scalable Codes for Precision Calculations of Properties of Complex Atomic Systems

2021

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High precision atomic data are indispensable for studies of fundamental symmetries, tests of fundamental physics postulates, developments of atomic clocks, ultracold atom experiments, astrophysics, plasma science, and many other fields of research. We have developed a new parallel atomic structure code package that enables computations that were not previously possible due to system complexity. This code package also allows much quicker computations to be run with higher accuracy for simple systems. We explored different methods of load-balancing matrix element calculations for many-electron systems, which are very difficult due to the intrinsic nature of the computational methods used to calculate them. Furthermore, dynamic memory allocation and MPI parallelization have been implemented to optimize and accelerate the computations. We have achieved near-perfect linear scalability and efficiency with the number of processors used for calculation, paving the way towards the future where most open-shell systems will finally be able to be treated with good accuracy. We present several examples illustrating new capabilities of the newly developed codes, specifically correlating up to all 60 electrons in the highly charged Ir17+ ion and predicting certain properties of Fe16+.

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Optical clocks based on the Cf15+ and Cf17+ ions

Cited by 39 publications

References 47 publications

Atomic calculations of hyperfine structure anomaly in gold

Atomic calculations of hyperfine structure anomaly in gold

Precision measurement of the $^3D_1$ and $^3D_2$ quadrupole moments in Lu$^+$

Scalable Codes for Precision Calculations of Properties of Complex Atomic Systems

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