Many-body calculations and hyperfine-interaction effect on dynamic polarizabilities at the low-lying energy levels of 
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Das, Arghya; Bhowmik, Anal; Dutta, Narendra Nath; Majumder, Sonjoy

doi:10.1103/physreva.102.012801

Cited by 6 publications

(5 citation statements)

References 89 publications

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“…The calculation of dipolar polarizability is based on the sum-over-state [36,37] formalism in which the accurate calculations of E1 matrix elements of 137 Ba + play an important role as the other factors, energy levels of the ion, are extracted from experimental measurements. As stated earlier, we employ correlation exhaustive relativistic coupled-cluster singles, doubles, and partial triple [RCCSD(T)] formalism [42][43][44][45][46][47] to calculate the most dominating E1 matrix elements.…”

Section: Resultsmentioning

confidence: 99%

“…v F (ω) and tensor α (t) v F (ω) component of valence polarizability at the hyperfine level can be related to the corresponding fine structure level as [36,74,75]…”

Section: Appendix: Dynamic Polarizabilities At the Hyperfine-level Of...mentioning

confidence: 99%

“…The most significant part of the dynamic polarizability [35,36] is its valence part, α V v (ω), compared to its other elements, core α C v (ω) and corevalence α V C v (ω) [35,36]. The former contribution is the utmost in calculating the differential Stark shifts where the other contributions are almost canceled out.…”

Section: Introductionmentioning

confidence: 99%

“…In this sum-over-states formalism [36,38], the main contributing reduced dipole matrix elements corresponding to low-lying excited energy states are calculated using the highly correlated RCCSD(T) method [39,40].…”

Section: Introductionmentioning

confidence: 99%

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Two-photon polarizability of Ba$^+$ ion: Control of spin-mixing process in an ultracold $^{137}$Ba$^+$--$^{87}$Rb mixture

Das¹,

Bhowmik²,

Dutta³

et al. 2021

Preprint

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Ionic clocks exhibit one of the most promising candidates for the frequency standards. Recent investigations show the profound advantages of interrogating two laser lights with different frequencies in developing the frequency standards. Here, we present a scheme of a two-photon excitation process to calculate the dynamic polarizabilities of a few low-lying states of 137 Ba + by employing highly correlated relativistic many-body theory. We demonstrate the Stark shift cancellation for the clock states of 137 Ba + at the two-photon magic wavelengths, which would be an essential input to achieve better accuracy for the ionic clock experiments. We also calculate the magic wavelengths under the single-photon process to serve as the reference and for a comparative study. The calculated single-and two-photon magic wavelengths lie in the optical regime and are thus significant for future state-of-the-art experiments. Further, as an application, we investigate the impact of the two-photon polarizability on the spin-mixing process of an ultra-cold spin-1 mixture 137 Ba + − 87 Rb.We demonstrate the flexibility of the spin-exchange mechanism in the mixture in the presence of a tunable magnetic field and highlight the two-photon process-specific spin-oscillation protocol.

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Section: Resultsmentioning

confidence: 99%

“…v F (ω) and tensor α (t) v F (ω) component of valence polarizability at the hyperfine level can be related to the corresponding fine structure level as [36,74,75]…”

Section: Appendix: Dynamic Polarizabilities At the Hyperfine-level Of...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two-photon polarizability of Ba$^+$ ion: Control of spin-mixing process in an ultracold $^{137}$Ba$^+$--$^{87}$Rb mixture

Das¹,

Bhowmik²,

Dutta³

et al. 2021

Preprint

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“…The aim of this paper is to estimate (a) energies of the ground and low-lying excited states, (b) the oscillator strengths of electromagnetically allowed transitions, (c) transition probabilities of the forbidden transitions, and (d) lifetimes for a few excited states of Ar 7+ , Kr 7+ , Xe 7+ , and Rn 7+ using the relativistic coupled-cluster (RCC) method [64][65][66]. The accuracies of the RCC calculations are well established by our group for different applications [67][68][69][70][71][72][73][74][75][76]. The all-order structure of electron correlation in the RCC theory has been elaborated in our earlier paper [77] and the review article by Bartlett [78].…”

Section: Introductionmentioning

confidence: 99%

Transitional Strength Under Plasma: Precise Estimations of Astrophysically Relevant Electromagnetic Transitions of Ar7, Kr7, Xe7, and Rn7 Under Plasma Atmosphere++++

Biswas

Bhowmik

Das

et al. 2023

Atoms

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The growing interest in atomic structures of moderately stripped alkali-like ions in the diagnostic study and modeling of astrophysical and laboratory plasma makes an accurate many-body study of atomic properties inevitable. This work presents transition line parameters in the absence or presence of plasma atmosphere for astrophysically important candidates Ar7+, Kr7+, Xe7+, and Rn7+. We employ relativistic coupled-cluster (RCC) theory, a well-known correlation exhaustive method. In the case of a plasma environment, we use the Debye Model. Our calculations agree with experiments available in the literature for ionization potentials, transition strengths of allowed and forbidden selections, and lifetimes of several low-lying states. The unit ratios of length and velocity forms of transition matrix elements are the critical estimation of the accuracy of the transition data presented here, especially for a few presented for the first time in the literature. We do compare our findings with the available recent theoretical results. Our reported data can be helpful to the astronomer in estimating the density of the plasma environment around the astronomical objects or in the discovery of observational spectra corrected by that environment. The present results should be advantageous in the modeling and diagnostics laboratory plasma, whereas the calculated ionization potential depression parameters reveal important characteristics of atomic structure.

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Vector polarizability of an atomic state induced by a linearly polarized vortex beam: External control of magic, tune-out wavelengths, and heteronuclear spin oscillations

2020

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Many-body calculations and hyperfine-interaction effect on dynamic polarizabilities at the low-lying energy levels of Y2+

Cited by 6 publications

References 89 publications

Two-photon polarizability of Ba$^+$ ion: Control of spin-mixing process in an ultracold $^{137}$Ba$^+$--$^{87}$Rb mixture

Two-photon polarizability of Ba$^+$ ion: Control of spin-mixing process in an ultracold $^{137}$Ba$^+$--$^{87}$Rb mixture

Transitional Strength Under Plasma: Precise Estimations of Astrophysically Relevant Electromagnetic Transitions of Ar7, Kr7, Xe7, and Rn7 Under Plasma Atmosphere++++

Vector polarizability of an atomic state induced by a linearly polarized vortex beam: External control of magic, tune-out wavelengths, and heteronuclear spin oscillations

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