Line Shapes of High Resolution Photoassociation Spectra of Optically Cooled Atoms

Napolitano, Reginaldo de Jesus; Weiner, J.; Williams, Carl J.; Julienne, Paul S.

doi:10.1103/physrevlett.73.1352

Cited by 143 publications

(128 citation statements)

References 15 publications

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“…where K(∆; I, p c , p r ) =h π k r µ e,g (2J g + 1) Γ pe Γ eg (I, ε r ) [∆ + ε D + ε r − ∆ e − E e (I, ε r ) − E rec,mol ] 2 + [Γ e (I, ε r )/2] 2 (2) is the loss rate [23,24,25] corresponding to particular momentum vectors of the relative motion of the two colliding atoms p r as well as the motion of their center of mass p c . Contributions from all possible transitions between excited bound and ground scattering states are included in this expression.…”

Section: Photoassociation Resonancementioning

confidence: 99%

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Borkowski¹,

Ciuryło²,

Julienne

et al. 2009

Phys. Rev. A

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The properties of bosonic Ytterbium photoassociation spectra near the intercombination transition 1 S0-3 P1 are studied theoretically at ultra low temperatures. We demonstrate how the shapes and intensities of rotational components of optical Feshbach resonances are affected by mass tuning of the scattering properties of the two colliding ground state atoms. Particular attention is given to the relationship between the magnitude of the scattering length and the occurrence of shape resonances in higher partial waves of the van der Waals system. We develop a mass scaled model of the excited state potential that represents the experimental data for different isotopes. The shape of the rotational photoassociation spectrum for various bosonic Yb isotopes can be qualitatively different.

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Section: Photoassociation Resonancementioning

confidence: 99%

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Borkowski¹,

Ciuryło²,

Julienne

et al. 2009

Phys. Rev. A

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“…The radiative collision data require modeling of the rate coefficient for the absorptions of a photon by a pair of ultracold Cs atoms [38]. However, we are interested in reproducing the location of Feshbach resonances, and not in the absolute absorption rates.…”

Section: Numerical Approachesmentioning

confidence: 99%

Precision Feshbach spectroscopy of ultracoldCs2

et al. 2004

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We have observed and located more than 60 magnetic field-induced Feshbach resonances in ultracold collisions of ground-state 133 Cs atoms. Multiple extremely weak Feshbach resonances associated with g-wave molecular states are detected through variations in the radiative collision cross sections. The Feshbach spectroscopy allows us to determine the interactions between ultracold cesium atoms and the molecular energy structure near the dissociation continuum with unprecedented precision. Our work not only represents a very successful collaboration of experimental and theoretical efforts, but also provides essential information for cesium Bose-Einstein condensation, Cs 2 molecules, and atomic clock experiments.

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“…For an ensemble of atom pairs with a Maxwell-Boltzmann velocity distribution, employing an isolated photoassociation resonance, the photoassociation rate coeffcient is given by [28] Kṽ′…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Enhancing photoassociation rates by nonresonant-light control of shape resonances

González‐Férez

Koch

2012

Phys. Rev. A

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Photoassociation, assembling molecules from atoms using laser light, is limited by the low density of atom pairs at sufficiently short interatomic separations. Here, we show that non-resonant light with intensities of the order of 10 10 W/cm 2 modifies the thermal cloud of atoms, enhancing the Boltzmann weight of shape resonances and pushing scattering states below the dissociation limit. This leads to an enhancement of photoassociation rates by several orders of magnitude and opens the way to significantly larger numbers of ground state molecules in a thermal ensemble than achieved so far.

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Line Shapes of High Resolution Photoassociation Spectra of Optically Cooled Atoms

Cited by 143 publications

References 15 publications

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Precision Feshbach spectroscopy of ultracoldCs2

Enhancing photoassociation rates by nonresonant-light control of shape resonances

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