Laser cooling of <sub>171</sub>Yb<sub>+</sub> ions in a frequency-modulated field

Prudnikov, O. N.; Chepurov, S. V.; Lugovoy, A.A.; Rumynin, K. M.; Кузнецов, С. Н.; Тайченачев, А. В.; Yudin, V. I.; Bagayev, S. N.

doi:10.1070/qel16490

Cited by 11 publications

(5 citation statements)

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“…and valid for the central elastic collision of two classical particles, are also presented. The performed investigation demonstrates the existence of rather broad region 1.3 a ⊥ /a s 1.7 where the ion lost energy during not a head-on collision with the atom approaches the value following from the classical consideration (20). This region, however, narrows significantly in the case of "head-on collision".…”

Section: B Improving Efficiency Of Sympathetic Cooling In Atom-ion Co...mentioning

confidence: 69%

“…Particularly, it is known that the micromotion of the ion and the longrange nature of its interaction with the environment of colder atoms in a hybrid atomic-ion trap prevent the desired effect of sympathetic cooling of ions [8,12]. Despite the successes achieved in sympathetic cooling of ions in hybrid atomic-ion systems in the millikelvin range and above [8,[13][14][15][16][17], as well as the proposed promising schemes for cooling to lower energies [7,11,12,[18][19][20], the problem of sympathetic cooling to lower energies in these systems is still pending.…”

Section: Introductionmentioning

confidence: 99%

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Improving Efficiency of Sympathetic Cooling in Atom-Ion and Atom-Atom Confined Collisions

Melezhik

2021

Preprint

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We propose a new way for sympathetic cooling of ions in an electromagnetic Paul trap: it implies the use for this purpose of cold buffer atoms in the region of atom-ion confinement-induced resonance (CIR). The problem is that the unavoidable micromotion of the ion and the long-range nature of its interaction with the environment of colder atoms in a hybrid atomic-ion trap prevent its sympathetic cooling. We show that the destructive effect of ion micromotion on its sympathetic cooling can however be suppressed in the vicinity of the atom-ion CIR. The origin of this is the "fermionization" of the atom-ion wave function near CIR, where the atom-ion pair behaves as a pair of noninteracting identical fermions. This prevents the complete approach of the atom with the ion near resonance and does not enhance the ion micromotion, which interferes with its sympathetic cooling. We investigate the effect of sympathetic cooling around CIRs in atom-ion and atom-atom confined collisions within the qusiclassical-quantum approach using the Li-Yb + and Li-Yb confined systems as an example. In this approach, the Schrödinger equation for a cold light atom is integrated simultaneously with the classical Hamilton equations for a hotter heavy ion or atom during collision. We have found the region near the atom-ion CIR where the sympathetic cooling of the ion by cold atoms is possible in a hybrid atom-ion trap. We also show that it is possible to improve the efficiency of sympathetic cooling in atomic traps by using atomic CIRs.

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Section: B Improving Efficiency Of Sympathetic Cooling In Atom-ion Co...mentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Improving Efficiency of Sympathetic Cooling in Atom-Ion and Atom-Atom Confined Collisions

Melezhik

2021

Preprint

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“…This allows for laser cooling in a broad range of different regimes ranging from the resolved sideband regime (γ eff ω osc ) to the semi-classical regime (γ eff > ω osc ), which can be described in terms of sub-Doppler [18,19] or Doppler (see e.g. [30,31,32,33]) forces acting from the resonant light field on the ion. Here, ω osc is the motional frequency the ion exhibits in the harmonic pseudopotential of the radio-frequency (rf) Paul trap.…”

Section: Introductionmentioning

confidence: 99%

Systematic study of tunable laser cooling for trapped-ion experiments

Kulosa¹,

Prudnikov²,

Vadlejch³

et al. 2023

Preprint

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We report on a comparative analysis of quenched sideband cooling in trapped ions. We introduce a theoretical approach for time-efficient simulation of the temporal cooling characteristics and derive the optimal conditions providing fast laser cooling into the ion's motional ground state. The simulations were experimentally benchmarked with a single 172 Yb + ion confined in a linear Paul trap. Sideband cooling was carried out on a narrow quadrupole transition, enhanced with an additional clearout laser for controlling the effective linewidth of the cooling transition. Quench cooling was thus for the first time studied in the resolved sideband, intermediate and semiclassical regime. We discuss the non-thermal distribution of Fock states during laser cooling and reveal its impact on time dilation shifts in optical atomic clocks.

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“…This allows for laser cooling in a broad range of different regimes ranging from the resolved sideband regime (γ eff ≪ ω osc ) to the semi-classical regime (γ eff > ω osc ), which can be described in terms of sub-Doppler [18,19] or Doppler (see e.g. [30][31][32][33][34][35]) forces acting from the resonant light field on the ion. Here, ω osc is the motional frequency the ion exhibits in the harmonic pseudopotential of the radio-frequency (rf) Paul trap.…”

Section: Introductionmentioning

confidence: 99%

Systematic study of tunable laser cooling for trapped-ion experiments

et al. 2023

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We report a comparative analysis of quenched sideband cooling in trapped ions. We introduce a theoretical approach for time-efficient simulation of the temporal cooling characteristics and derive the optimal conditions providing fast laser cooling into the ion’s motional ground state. The simulations were experimentally benchmarked with a single 172Yb+ ion confined in a linear Paul trap. Sideband cooling was carried out on a narrow quadrupole transition, enhanced with an additional clear-out laser for controlling the effective linewidth of the cooling transition. Quench cooling was thus for the first time studied in the resolved sideband, intermediate and semi-classical regime. We discuss the non-thermal distribution of Fock states during laser cooling and reveal its impact on time dilation shifts in optical atomic clocks.

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Laser cooling of ₁₇₁Yb₊ ions in a frequency-modulated field

Cited by 11 publications

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Improving Efficiency of Sympathetic Cooling in Atom-Ion and Atom-Atom Confined Collisions

Improving Efficiency of Sympathetic Cooling in Atom-Ion and Atom-Atom Confined Collisions

Systematic study of tunable laser cooling for trapped-ion experiments

Systematic study of tunable laser cooling for trapped-ion experiments

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Laser cooling of 171Yb+ ions in a frequency-modulated field

Cited by 11 publications

References 0 publications

Improving Efficiency of Sympathetic Cooling in Atom-Ion and Atom-Atom Confined Collisions

Improving Efficiency of Sympathetic Cooling in Atom-Ion and Atom-Atom Confined Collisions

Systematic study of tunable laser cooling for trapped-ion experiments

Systematic study of tunable laser cooling for trapped-ion experiments

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Laser cooling of ₁₇₁Yb₊ ions in a frequency-modulated field