Photoassociative spectroscopy of long-range states of ultracold 6Li2 and 7Li2

Abraham, E.; Ritchie, N. W. M.; McAlexander, W. I.; Hulet, Randall G.

doi:10.1063/1.470296

Cited by 92 publications

(41 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All the above results remain valid for finite momenta of colliding atoms, k ø min͕r 21 t , jāj 21 , jaj 21 ͖. We performed calculations for 7 Li by using G 3.7 3 10 7 s 21 and spectroscopic information on the location of bound p levels in the excited electronic state 3 S 1 g [17]. The functions f 0 ͑r͒ and f͑r͒ were calculated by using the potential of interaction in the ground state 3 S 1 u from [18], the scattering length in the absence of light beingā ഠ 214 Å.…”

Section: Influence Of Nearly Resonant Light On the Scattering Length mentioning

confidence: 99%

Influence of Nearly Resonant Light on the Scattering Length in Low-Temperature Atomic Gases

et al. 1996

View full text Add to dashboard Cite

show abstract

Section: Influence Of Nearly Resonant Light On the Scattering Length mentioning

confidence: 99%

Influence of Nearly Resonant Light on the Scattering Length in Low-Temperature Atomic Gases

et al. 1996

View full text Add to dashboard Cite

show abstract

“…We are thus sensitive to molecular states in potentials asymptoting to both Yb( 1 S)+Li( 2 P) and Li( 2 S)+Li( 2 P). Since the homonuclear Li( 2 S)+Li( 2 P) interatomic potential falls off as 1/R 3 at large separation, the background from Li 2 PA consists of strong, closely spaced resonances [23]. To combat this background, as well as to mitigate the problems of low densities in the bright-bright dual MOT and low Franck-Condon factors due to the 1/R 6 shorter range potential of Yb and Li, we use a PA beam with very high intensity.…”

Section: Li2 Photoassociation In a Dual Yb-li Motmentioning

confidence: 99%

“…The two broad Li PA features correspond to the v = −82 and −83 vibrational states of the 1 3 Σ + g excited state potential [23]. To understand the striking response of the Yb MOT fluorescence around Li PA features, it is useful to examine the spatially integrated rate equation for Yb,…”

Section: Li2 Photoassociation In a Dual Yb-li Motmentioning

confidence: 99%

See 1 more Smart Citation

Photoassociative production of ultracold heteronuclearYbLi*molecules

et al. 2016

View full text Add to dashboard Cite

We report on the production of ultracold heteronuclear YbLi* molecules in a dual-species magnetooptical trap by photoassociation (PA). The formation of the electronically excited molecules close to dissociation was observed by trap loss spectroscopy. We find 4 rovibrational states within a range of 250 GHz below the Yb( 1 S0) + Li( 2 P 1/2 ) asymptote and observe isotopic PA line shifts in mixtures of 6 Li with 174 Yb, 172 Yb, and 176 Yb. We also describe our theoretical ab-initio calculation for the relevant electronic potentials and utilize it to analyze and identify the lines in the experimentally observed spectrum.

show abstract

“…Up to 85 mW of PA light, coupled out of a single-mode fiber is focused onto the atoms. The laser frequency is tuned to near resonance with the v 0 83 vibrational level of the 1 3 g state, which has a binding energy of 60 GHz relative to the 2P 1=2 asymptote [27]. The relative frequency of the PA laser is monitored by comparing it with a reference laser locked to an atomic transition using a scanning FabryPerot etalon.…”

mentioning

confidence: 99%

Intensity Dependence of Photoassociation in a Quantum Degenerate Atomic Gas

et al. 2003

View full text Add to dashboard Cite

We have measured the intensity dependent rate and frequency shift of a photoassociation transition in a quantum degenerate gas of 7 Li. The rate increases linearly with photoassociation laser intensity for low intensities, whereas saturation is observed at higher intensities. The measured rates and shifts agree reasonably well with theory within the estimated systematic uncertainties. Several theoretically predicted saturation mechanisms are discussed, but a theory in which saturation arises because of quantum mechanical unitarity agrees well with the data. DOI: 10.1103/PhysRevLett.91.080402 PACS numbers: 03.75.Nt, 33.20.Kf, 33.70.-w, 34.20.Cf Photoassociation (PA) of ultracold atoms has been a remarkably useful tool for determining scattering lengths characterizing ultracold atom collisions, for producing ultracold molecules, and for providing extremely precise measurements of atomic radiative lifetimes (see Refs. [1,2] for reviews). This utility is largely a consequence of the spectroscopic precision afforded by the small thermal broadening in a laser or evaporatively cooled gas. Quantum degenerate gases are especially interesting because the coherence of the atomic field may enable the formation of a molecular Bose-Einstein condensate (BEC) from an atomic one by coherent Raman transitions [3,4], stimulated Raman adiabatic passage [5], or by other coherent adiabatic population transfer schemes [6,7].There have been extensive theoretical studies of the rate of PA [8][9][10][11][12]. The rate is predicted to increase linearly with intensity at low intensities, while various mechanisms have been proposed that cause saturation of the rate at higher intensities. Among these mechanisms are the quantum mechanical unitarity limit on the rate of atomic collisions [11], a breakdown of the two-mode approximation [4,13] for PA of Bose condensates caused by coupling to noncondensed atomic modes [12,14 -16], and the depletion of the atomic pair correlation function [15]. Photoassociation resonances are also predicted to exhibit a spectral shift proportional to the light intensity caused by coupling to the continuum of free-atom states [11,[17][18][19]. In contrast to theory, there are relatively few experimental measurements, and only two that could be considered ''precise'' (which we define as measurements with uncertainties of less than a factor of 2). We previously measured the spectral light shift using quantum degenerate 7 Li and obtained good agreement with theory [20]. Both the spectral shift and the PA rate constant were recently measured in a Na condensate, and good agreement with two-body theory was found [21]. Saturation was not observed in this experiment. Saturation was observed in two other lower precision experiments [22,23], but these experiments were performed in a magneto-optical trap, where the temperatures were greater than 100 K and the corresponding unitaritylimited rates were quite small, of the order of 1 s ÿ1 or less.We report precise measurements of both the rate of PA and the spectral shift in...

show abstract

Photoassociative spectroscopy of long-range states of ultracold 6Li2 and 7Li2

Abstract: Magnetism of Cu 2 Cd B 2 O 6 : Quantum spin system having a nearly singlet state and antiferromagnetic longrange order J. Appl. Phys. 99, 08H504 (2006); 10.1063/1.2176111Determination of long-range interactions from photoassociative spectroscopy of ultracold atoms AIP Conf.

Cited by 92 publications

References 39 publications

Influence of Nearly Resonant Light on the Scattering Length in Low-Temperature Atomic Gases

Influence of Nearly Resonant Light on the Scattering Length in Low-Temperature Atomic Gases

Photoassociative production of ultracold heteronuclearYbLi*molecules

Intensity Dependence of Photoassociation in a Quantum Degenerate Atomic Gas

Contact Info

Product

Resources

About