Long-range interactions between like homonuclear alkali metal diatoms

Byrd, Jason N.; Côté, Robin

doi:10.1063/1.3671371

Cited by 23 publications

(44 citation statements)

References 42 publications

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“…Concerning the specific cases of alkali dimers, one can quote for instance the work by Byrd et al [120], Buchachenko et al [121],Żuchowski et al [122]. In contrast with these works, the present approach based on the sum-over-states formula of Eq.…”

Section: Molecular Structure Datamentioning

confidence: 81%

Dynamic dipole polarizabilities of heteronuclear alkali dimers: optical response, trapping and control of ultracold molecules

Véxiau

Borsalino

Lepers

et al. 2017

International Reviews in Physical Chemistry

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In this article we address the general approach for calculating dynamical dipole polarizabilities of small quantum systems, based on a sum-over-states formula involving in principle the entire energy spectrum of the system. We complement this method by a few-parameter model involving a limited number of effective transitions, allowing for a compact and accurate representation of both the isotropic and anisotropic components of the polarizability. We apply the method to the series of ten heteronuclear molecules composed of two of ( 7 Li, 23 Na, 39 K, 87 Rb, 133 Cs) alkali-metal atoms. We rely on both up-to-date spectroscopically-determined potential energy curves for the lowest electronic states, and on our systematic studies of these systems performed during the last decade for higher excited states and for permanent and transition dipole moments. Such a compilation is timely for the continuously growing researches on ultracold polar molecules. Indeed the knowledge of the dynamic dipole polarizabilities is crucial to model the optical response of molecules when trapped in optical lattices, and to determine optimal lattice frequencies ensuring optimal transfer to the absolute ground state of initially weakly-bound molecules. When they exist, we determine the so-called "magic frequencies" where the ac-Stark shift and thus the viewed trap depth, is the same for both weakly-bound and ground-state molecules.

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Section: Molecular Structure Datamentioning

confidence: 81%

Dynamic dipole polarizabilities of heteronuclear alkali dimers: optical response, trapping and control of ultracold molecules

Véxiau

Borsalino

Lepers

et al. 2017

International Reviews in Physical Chemistry

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“…For rubidium these basis sets use the small-core ECP28MWB [35] Stuttgart pseudopotential, which removes the argon core electrons from the calculation while leaving the 4s4p5s electrons free for use in further correlation calculations. The addition of even tempered spdf diffuse functions to these basis sets was done to better describe the anion, while the addition of these diffuse functions has also shown to improve molecular properties [36,37] as well. This aug-Def2-nZVPP basis set was used for rubidium in all riv electronic structure calculations in this work.…”

Section: Electronic Structure Calculationsmentioning

confidence: 99%

Associative detachment of rubidium hydroxide

2013

Self Cite

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We performed calculations of the optimized structure, harmonic vibrational frequencies and dissociation energies of RbOH and its anion, and investigate the interactions between Rb and OH$^-$ leading to possible associative detachment pathways. The electron affinity of RbOH was computed to be 0.2890 eV, with a bond energy of Rb+OH$^-$ half that of Rb+OH. To determine other possible charge loss pathways, the Rb+OH and Rb+OH$^-$ dissociation curves were computed using couple cluster methods along all possible collisional angles. An adiabatic curve crossing between the neutral and charged molecule was found at the inner wall of the molecular potential curve for linear geometries. Associative detachment rates were estimated using the Langevin ion capture cross-section for hydroxide. We find for $v\ge 2$ an associative detachment rate of $>2\times 10^{-9}$ cm$^3$s$^{-1}$, while for $v=0$ and 1 no appreciable rate exists. This strong dependence on vibrational level suggests the ability to control the associative detachment rate directly

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“…Alkaline diatoms have larger mass and larger electric quadrupole moment (∼ 50 DebyeÅ [23] In this paper we are interested in the BECs of particles possessing the dipole and quadrupole moments simultaneously. Spectrum (13) shows that the quadrupolar term change the short-wavelength part of spectrum, then main contribution of the dipolar term is in the long-wavelength limit.…”

Section: Bogoliubov Spectrummentioning

confidence: 99%

“…Efforts to explore of quadrupolar quantum gases are encouraged by experimental data on the quadrupole moment of atoms and molecules [18]- [23].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous dipole and quadrupole moment contribution in the Bogoliubov spectrum: Application of the non-integral Gross–Pitaevskii equation

Andreev

2017

Mod. Phys. Lett. B

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We present the Gross-Pitaevskii equation for Bose-Einstein condensates (BECs) possessing the electric dipole and the electric quadrupole moments in a non-integral form. These equations are coupled with the Maxwell equations. The model under consideration includes the dipole-dipole, the dipole-quadrupole, and the quadrupole-quadrupole interactions in terms of the electric field created by the dipoles and quadrupoles. We apply this model to obtain the Bogoliubov spectrum for three dimensional BECs with a repulsive short-range interaction. We obtain an extra term in the Bogoliubov spectrum in compare with the dipolar BECs. We show that the quadrupole-quadrupole interaction gives a positive contribution in the Bogoliubov spectrum. Hence this spectrum is stable.

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Long-range interactions between like homonuclear alkali metal diatoms

Cited by 23 publications

References 42 publications

Dynamic dipole polarizabilities of heteronuclear alkali dimers: optical response, trapping and control of ultracold molecules

Dynamic dipole polarizabilities of heteronuclear alkali dimers: optical response, trapping and control of ultracold molecules

Associative detachment of rubidium hydroxide

Simultaneous dipole and quadrupole moment contribution in the Bogoliubov spectrum: Application of the non-integral Gross–Pitaevskii equation

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