Weakly bound molecules as sensors of new gravitylike forces

Borkowski, Mateusz; Buchachenko, Alexei A.; Ciuryło, R.; Julienne, Paul S.; Yamada, H.; Kikuchi, Yuta; Takasu, Yoshio; Takahashi, Yoshiro

doi:10.1038/s41598-019-51346-y

Cited by 44 publications

(34 citation statements)

References 35 publications

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“…10(b) for three electric fields. We see that the ac Stark shift scales approximately as I 2 ; this phenomenon is often termed "hyperpolarizability," but it is important to recognize that it is completely described within (11), which includes only electronic polarizability and not electronic hyperpolarizability. At higher electric fields, the effect of α (2) is reduced; at 300 V cm −1 the maximum frequency shift due to α (2) is Fig.…”

Section: B In Combined Electric and Magnetic Fieldsmentioning

confidence: 93%

“…We now apply the full Hamiltonian of (1)- (11) to RbCs molecules in the v = 0 state of the 1 + electronic state, as used in our experiments. We use the spectroscopic constants tabulated in Ref.…”

Section: B Application To Rbcsmentioning

confidence: 99%

“…The mixing of hyperfine states causes complex patterns of crossings and avoided crossings. We calculate these patterns by diagonalizing the full Hamiltonian of (1)- (11). We fit simultaneously to the experimental microwave spectra for β = 0 • and 90 • and obtain a good fit with the single value α (2) /4π 0 = 1997(6) a 0 3 .…”

Section: B Anisotropic Polarizabilitymentioning

confidence: 99%

“…Experimental interest in ultracold molecules is growing rapidly, spurred on by applications spanning precision measurement [1][2][3][4][5][6][7][8][9][10][11], state-resolved chemistry [12][13][14][15][16][17], dipolar quantum matter [18][19][20][21][22], quantum simulation [23][24][25][26][27][28], and quantum-information processing [29][30][31][32][33][34][35]. Two prominent methods have emerged for producing molecular gases in the ultracold regime.…”

Section: Introductionmentioning

confidence: 99%

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Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

et al. 2020

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We investigate the effects of static electric and magnetic fields on the differential ac Stark shifts for microwave transitions in ultracold bosonic 87 Rb 133 Cs molecules, for light of wavelength λ = 1064 nm. Near this wavelength we observe unexpected two-photon transitions that may cause trap loss. We measure the ac Stark effect in external magnetic and electric fields, using microwave spectroscopy of the first rotational transition. We quantify the isotropic and anisotropic parts of the molecular polarizability at this wavelength. We demonstrate that a modest electric field can decouple the nuclear spins from the rotational angular momentum, greatly simplifying the ac Stark effect. We use this simplification to control the ac Stark shift using the polarization angle of the trapping laser.

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Section: B In Combined Electric and Magnetic Fieldsmentioning

confidence: 93%

Section: B Application To Rbcsmentioning

confidence: 99%

Section: B Anisotropic Polarizabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

et al. 2020

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“…Open‐shell molecules involving Yb, like RbYb or LiYb, can be used in searches for the electric dipole moment of the electron (eEDM) . Thanks to its simple structure, the ground state Yb dimer is an excellent testing ground for the search for new short scale gravitylike forces, temporal variations of the proton‐to‐electron mass ratio, or beyond‐Born‐Oppenheimer effects . An “optical molecular clock” utilizing forbidden J = 0 ↔ 0 transitions between the ground

((), 1) 0_{g}^{+}

and clock

((), 1) 0_{u}^{-}

states in Yb 2 could provide energy level measurements at an accuracy so far unprecedented in molecular spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Modeling the electronic structures of the ground and excited states of the ytterbium atom and the ytterbium dimer: A modern quantum chemistry perspective

Tecmer

Boguslawski

Borkowski

et al. 2019

Int J of Quantum Chemistry

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We present a comprehensive theoretical study of the electronic structures of the Yb atom and the Yb 2 molecule, respectively, focusing on their ground and lowest-lying electronically excited states. Our study includes various state-of-the-art quantum chemistry methods such as CCSD, CCSD(T), CASPT2 (including spin-orbit coupling), and EOM-CCSD as well as some recently developed pCCD-based approaches and their extensions to target excited states. Specifically, we scan the lowest-lying potential energy surfaces of the Yb 2 dimer and provide a reliable benchmark set of spectroscopic parameters including optimal bond lengths, vibrational frequencies, potential energy depths, and adiabatic excitation energies. Our in-depth analysis unravels the complex nature of the electronic spectrum of Yb 2 , which is difficult to model accurately by any conventional quantum chemistry method. Finally, we scrutinize the biexcited character of the first 1 Σ + g excited state and its evolution along the potential energy surface. K E Y W O R D S relativistic effects, electron corellation effects, spin-orbit coupling, equation of motion coupled cluster, CASPT2 | INTRODUCTIONThe divalent ytterbium atom has in recent years garnered significant attention thanks to its many uses in cold atom physics. It has a nonmagnetic 1 S 0 ground state and several useful optical transitions: the strong 1 S 0 $ 1 P 1 line can be used for Zeeman slowing, whereas the narrow (181 kHz) intercombination 1 S 0 $ 3 P 1 line can be used to directly laser cool Yb atoms to microkelvin temperatures. [1] Yb has seven stable isotopes: two fermions (171 and 173 with nuclear spins of 1/2 and 5/2, respectively) and five bosons (168, 170, 172, 174, and 176) that lack nuclear spin. The rich isotope structure makes it possible to mass-tune the atomic interactions [2] and facilitates a wide array of possible quantum-degenerate gases. [3][4][5][6] The doubly forbidden 1 S 0 $ 3 P 0 transition lies at the heart of optical atomic clocks [7] that are among the most precise physical instruments known to mankind. For example, an ytterbium clock has recently been demonstrated to enable geopotential measurements with an accuracy below a centimeter. [8] The long-lived 3 P 0 clock states also find use in quantum simulations using Yb atoms. [9] The long-range interactions in the Yb dimer have been probed extensively by high-resolution photoassociation spectroscopy (PAS) [10] near the narrow 1 S 0 $ 3 P 1 intercombination line. The excited 1 S 0 + 3 P 1 (0 + u ) [11,12] state has been probed by single color PAS and provided the van der Waals C 6 coefficient and an improved value of the atomic 3 P 1 lifetime. Two-color PAS of ground state 0 + g vibrational levels [2,13] delivered accurate

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Testing Gravity and Predictions Beyond the Standard Model at Short Distances: The Casimir Effect

Klimchitskaya,

Mostepanenko

2023

Lecture Notes in Physics

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Weakly bound molecules as sensors of new gravitylike forces

Cited by 44 publications

References 35 publications

Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

Modeling the electronic structures of the ground and excited states of the ytterbium atom and the ytterbium dimer: A modern quantum chemistry perspective

Testing Gravity and Predictions Beyond the Standard Model at Short Distances: The Casimir Effect

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