Near-dissociation photoassociative production of deeply bound NaCs molecules

Zabawa, Patrick; Wakim, Amy; Neukirch, Amanda; Haimberger, Chris; Bigelow, N. P.; Stolyarov, A. V.; Pazyuk, E. A.; Tamanis, M.; Ferber, R.

doi:10.1103/physreva.82.040501

Cited by 28 publications

(27 citation statements)

References 36 publications

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“…The most spectacular experimental achievements on ultracold dipolar molecular gases have been performed on KRb molecules [8,9,11,19] which motivated a wealth of theoretical investigations on this species [17,[20][21][22][23]. An * maxence.lepers@u-psud.fr accurate description of long-range interactions involving the other heteronuclear alkali diatoms is strongly needed since they draw rising attention [24][25][26][27][28][29][30][31][32]. Considering two identical polar molecules at large distances R (in atomic units 1 a.u.…”

Section: Introductionmentioning

confidence: 99%

Long-range interactions between polar alkali-metal diatoms in external electric fields

et al. 2013

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We computed the long-range interactions between two identical polar bialkali molecules in their rovibronic ground level, for all ten species involving Li, Na, K, Rb and Cs, using accurate quantum chemistry results combined with available spectroscopic data. Huge van der Waals interaction is found for eight species in free space. The competition of the van der Waals interaction with the dipole-dipole interaction induced by an external electric field parallel or perpendicular to the intermolecular axis is investigated by varying the electric field magnitude and the intermolecular distance. Our calculations predict a regime with the mutual orientation of the two molecules but with no preferential direction in the laboratory frame. A mechanism for the stimulated one-photon radiative association of a pair of ultracold polar molecules into ultracold tetramers is proposed, which would open the way towards the optical manipulation of ultracold polyatomic molecules.

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Section: Introductionmentioning

confidence: 99%

Long-range interactions between polar alkali-metal diatoms in external electric fields

et al. 2013

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“…The PA resonances categorized as being from the c-B complex from Table 3.3, all produce deeply bound singlet ground states with distributions similar to previous work [59], described in Chapter 2, modulated by FC factors. After analyzing the PA spectra, we are able assign the near dissociation PA resonance from reference [59] as c-B complex(N=128) or c 3 Σ + (v =70).…”

Section: ω=1mentioning

confidence: 59%

“…After analyzing the PA spectra, we are able assign the near dissociation PA resonance from reference [59] as c-B complex(N=128) or c 3 Σ + (v =70). GHz.…”

Section: ω=1mentioning

confidence: 99%

“…Initially, we choose a PA resonance that is part of the (4)Ω=1 progression [1], detuned 32 GHz from the Cs 6 2 S 1/2 → 6 2 P 3/2 transition. This channel has a high formation rate, estimated to be ∼10 7 molecules/s determined from spectroscopic results [59], the wavefunction overlap of the PA resonance with the singlet ground state calculated using LEVEL 8.0 [30], and by considering experimental geometry. This calculation is detailed in Appendix D. The ultracold molecules are not trapped and drift away from the formation/manipulation/detection region over a period of ∼10ms estimated from the measured kinetic temperature of ∼250 µK.…”

Section: The Experimentsmentioning

confidence: 99%

“…We then probe the populated vibrational states of the NaCs sample using Resonance Enhanced Multi-photon Ionization (REMPI) where the neutral molecules are ionized and subsequently detected by a channel electron multiplier (CEM) using time of flight mass spectroscopy. Other spectroscopic techniques are employed to unambiguously determine the rovibrational state populations, such as pulsed depletion spectroscopy (PDS) [59] and cw depletion spectroscopy [62].…”

Section: The Experimentsmentioning

confidence: 99%

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The Dipole Correction Method for Extracting Excited State Potentials and Electronic Transition Dipoles from Fluorescence Data

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We have developed a new inversion scheme for the accurate extraction of excited state potentials from fluorescence line positions and line strengths which does not make use of the Franck Condon Approximation (FCA). Our “dipole correction” method also enables the extraction of the coordinate dependence of the electronic transition dipoles. The accuracy of the potential energy surfaces (PES) thus extracted is much higher than that of the FCA‐ derived PES. The procedure, illustrated for the Na2 A(1Σ+u) → X(1Σ+g) P‐branch emission, results in global errors of 0.1 cm−1, and average errors near the PES minimum of 0.03 cm−1, with A → X electronic transition dipole function accuracies better than 1×10−3 Debye. We also show that it is possible to use emission data from a few select states: Global errors as small as 0.08 cm−1 for the Na2 B(1Πu) PES, using emissions data from only the s=0–5 low‐lying levels or the s=20–23 states, are demonstrated.

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Near-dissociation photoassociative production of deeply bound NaCs molecules

Cited by 28 publications

References 36 publications

Long-range interactions between polar alkali-metal diatoms in external electric fields

Long-range interactions between polar alkali-metal diatoms in external electric fields

Luminorefrigeration of NaCs

The Dipole Correction Method for Extracting Excited State Potentials and Electronic Transition Dipoles from Fluorescence Data

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