Terahertz Vibrational Molecular Clock with Systematic Uncertainty at the 
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Leung, Kon H.; Iritani, Brandon; Tiberi, Emily; Majewska, I.; Borkowski, Mateusz; Moszyński, Robert; Zelevinsky, Tanya

doi:10.1103/physrevx.13.011047

Cited by 18 publications

(4 citation statements)

References 118 publications

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“…9 Very recently, a new type of molecular lattice clock based on ultracold Sr 2 dimers with long vibrational coherence has also been established. 10,11 This paves the way for upcoming applications of these molecules in quantum simulation, 12 quantum metrology, 13 and precision measurements probing the fundamental laws of nature. 14,15 Exciting developments and applications of ultracold molecules described above would not have been feasible without thorough experimental spectroscopic analysis and substantial theoretical ab initio electronic structure evaluations of the underlying molecular structure.…”

Section: ■ Introductionmentioning

confidence: 98%

“…Nevertheless, ultracold Sr 2 molecules have already been employed in a series of exciting experiments ranging from studying asymptotic physics in subradiant states to photodissociation with quantum state control . Very recently, a new type of molecular lattice clock based on ultracold Sr 2 dimers with long vibrational coherence has also been established. , This paves the way for upcoming applications of these molecules in quantum simulation, quantum metrology, and precision measurements probing the fundamental laws of nature. , …”

Section: Introductionmentioning

confidence: 99%

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Excited Electronic States of Sr₂: Ab Initio Predictions and Experimental Observation of the 2¹Σ_u⁺ State

et al. 2023

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Despite its apparently simple nature with four valence electrons, the strontium dimer constitutes a challenge for modern electronic structure theory. Here we focus on excited electronic states of Sr2, which we investigate theoretically up to 25000 cm–1 above the ground state, to guide and explain new spectroscopic measurements. In particular, we focus on potential energy curves for the 11Σ u +, 21Σ u +, 11Π u , 21Π u , and 11Δ u states computed using several variants of ab initio coupled-cluster and configuration-interaction methods to benchmark them. In addition, a new experimental study of the excited 21Σ u + state using polarization labeling spectroscopy is presented, which extends knowledge of this state to high vibrational levels, where perturbation by higher electronic states is observed. The available experimental observations are compared with the theoretical predictions and help to assess the accuracy and limitations of employed theoretical models. The present results pave the way for future more accurate theoretical and experimental spectroscopic studies.

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Section: ■ Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Excited Electronic States of Sr₂: Ab Initio Predictions and Experimental Observation of the 2¹Σ_u⁺ State

et al. 2023

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“…Ultracold molecules have many applications that are now emerging, ranging from quantum simulation [1,2], quantum computing [3][4][5], the study of novel quantum phases [6,7], and tests of fundamental physics [8][9][10]. Key to most of these applications are polar molecules, which can have long-range anisotropic interactions resulting from their permanent dipoles.…”

Section: Introductionmentioning

confidence: 99%

Tunable Feshbach resonances in collisions of ultracold molecules in $^2Σ$ states with alkali-metal atoms

Bird¹,

Tarbutt²,

Hutson³

2023

Preprint

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We consider the magnetically tunable Feshbach resonances that may exist in ultracold mixtures of molecules in 2 Σ states and alkali-metal atoms. We focus on Rb+CaF as a prototype system. There are likely to be Feshbach resonances analogous to those between pairs of alkali-metal atoms. We investigate the patterns of near-threshold states and the resonances that they cause, using coupledchannel calculations of the bound states and low-energy scattering on model interaction potentials. We explore the dependence of the properties on as-yet unknown potential parameters. There is a high probability that resonances will exist at magnetic fields below 1000 G, and that these will be broad enough to control collisions and form triatomic molecules by magnetoassociation. We consider the effect of CaF rotation and potential anisotropy, and conclude that they may produce additional resonances but should not affect the existence of rotation-free resonances.

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“…In 2019 Tanya Zelevinsky of Columbia University and her collaborators overcame those hurdles to measure a vibrational transition in diatomic strontium to one part in 10 12 . Now, after four years of improvements to the experiment, the team has attained an accuracy 100 times greater [1].Zelevinsky and her team chose Sr 2 for their molecular clock…”

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confidence: 99%

New Accuracy Record for Molecular Lattice Clock

Day¹

2023

Physics

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Researchers have attained a 100-fold increase in the accuracy of a molecular clock that could serve as a terahertz-frequency standard and as a platform for investigating new physics.By Charles Day M olecules can rotate, vibrate, and twist. With each of those degrees of freedom comes a ladder of quantized energy levels whose spacings typically occupy the terahertz band. Because the ladder's steps are tiny, molecules are exquisitely sensitive probes of internal and external fields. But the sensitivity complicates the two principal operations needed to build a working probe: cooling and trapping. In 2019 Tanya Zelevinsky of Columbia University and her collaborators overcame those hurdles to measure a vibrational transition in diatomic strontium to one part in 10 12 . Now, after four years of improvements to the experiment, the team has attained an accuracy 100 times greater [1].Zelevinsky and her team chose Sr 2 for their molecular clock

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Terahertz Vibrational Molecular Clock with Systematic Uncertainty at the 10−14 Level

Cited by 18 publications

References 118 publications

Excited Electronic States of Sr₂: Ab Initio Predictions and Experimental Observation of the 2¹Σ_u⁺ State

Excited Electronic States of Sr₂: Ab Initio Predictions and Experimental Observation of the 2¹Σ_u⁺ State

Tunable Feshbach resonances in collisions of ultracold molecules in $^2Σ$ states with alkali-metal atoms

New Accuracy Record for Molecular Lattice Clock

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Terahertz Vibrational Molecular Clock with Systematic Uncertainty at the 10−14 Level

Cited by 18 publications

References 118 publications

Excited Electronic States of Sr2: Ab Initio Predictions and Experimental Observation of the 21Σu+ State

Excited Electronic States of Sr2: Ab Initio Predictions and Experimental Observation of the 21Σu+ State

Tunable Feshbach resonances in collisions of ultracold molecules in $^2Σ$ states with alkali-metal atoms

New Accuracy Record for Molecular Lattice Clock

Contact Info

Product

Resources

About

Excited Electronic States of Sr₂: Ab Initio Predictions and Experimental Observation of the 2¹Σ_u⁺ State

Excited Electronic States of Sr₂: Ab Initio Predictions and Experimental Observation of the 2¹Σ_u⁺ State