Finite-temperature effects on a triatomic Efimov resonance in ultracold cesium

Bo, Huang; Sidorenkov, Leonid A.; Grimm, Rudolf

doi:10.1103/physreva.91.063622

Cited by 16 publications

(20 citation statements)

References 52 publications

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“…Although in this case the exact log-periodicity of threebody observables is not expected, the Efimov scenario can still be checked by analyzing how well a zero-range theory curve fits experimental data. This procedure has recently been employed for characterizing low-lying Efimov resonances and retrieving three-body parameters from finite-temperature loss data in the case of identical bosons [17,40] and equal-mass three-component fermions [41].…”

Section: Introductionmentioning

confidence: 99%

Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture

et al. 2016

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We study Efimov resonances via three-body loss in an ultracold two-component gas of fermionic 6 Li and bosonic 133 Cs atoms close to a Feshbach resonance at 843 G, extending results reported previously [Pires et al., Phys. Rev. Lett. 112, 250404 (2014)] to temperatures around 120 nK. The experimental scheme for reaching lower temperatures is based upon compensating the gravityinduced spatial separation of the mass-imbalanced gases with bichromatic optical dipole traps. We observe the first and second excited Li-Cs-Cs Efimov resonance in the magnetic field dependence of the three-body event rate constant, in good agreement with the universal zero-range theory at finite temperature [Petrov and Werner, Phys. Rev. A 92, 022704 (2015)]. Deviations are found for the Efimov ground state, and the inelasticity parameter η is found to be significantly larger than those for single-species systems.

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Section: Introductionmentioning

confidence: 99%

Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture

et al. 2016

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“…Vitaly Efimov's 1970prediction (Efimov, 1970 that an infinite family of universal three-body states should emerge when two or more two-body scattering lengths are sufficiently large in magnitude first received partial experimental confirmation in 2006 by Rudi Grimm's group in Innsbruck (Kraemer et al, 2006). That development was quickly followed by many subsequent experiments Berninger et al, 2011Berninger et al, , 2013Bloom et al, 2013;Dyke et al, 2013;Ferlaino et al, 2009aFerlaino et al, , 2008Ferlaino et al, , 2011Gross et al, 2009Gross et al, , 2010Gross et al, , 2011Häfner et al, 2017;Hu et al, 2014;Huang et al, 2014aHuang et al, , 2015Huang et al, , 2014bJohansen et al, 2016;Knoop et al, 2010Knoop et al, , 2009Kunitski et al, 2015;Lompe et al, 2010a;Machtey et al, 2012a,b;Maier et al, 2015;Nakajima et al, 2010Nakajima et al, , 2011aOttenstein et al, 2008;Pires et al, 2014b;Pollack et al, 2009;Roy et al, 2013;Tung et al, 2014;Ulmanis et al, 2016a,b;Wacker et al, 2016;Wang et al, 2016;Wenz et al, 2009;Wild et al, 2012;Zaccanti et al, 2009;Zenesini et al, 2013) bearing on various aspects of the Efimov effect and u...…”

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confidence: 99%

Universal few-body physics and cluster formation

2017

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A recent rejuvenation of experimental and theoretical interest in the physics of few- body systems has provided deep, fundamental insights into a broad range of problems. Few-body physics is a cross-cutting discipline not restricted to conventional subject ar- eas such as nuclear physics or atomic or molecular physics. To a large degree, the recent explosion of interest in this subject has been sparked by dramatic enhancements of experimental capabilities in ultracold atomic systems over the past decade, which now permit atoms and molecules to be explored deep in the quantum mechanical limit with controllable two-body interactions. This control, typically enabled by magnetic or electromagnetically-dressed Fano-Feshbach resonances, allows in particular access to the range of universal few-body physics, where two-body scattering lengths far exceed all other length scales in the problem. The Efimov effect, where 3 particles experienc- ing short-range interactions can counterintuitively exhibit an infinite number of bound or quasi-bound energy levels, is the most famous example of universality. Tremendous progress in the field of universal Efimov physics has taken off, driven particularly by a combination of experimental and theoretical studies in the past decade, and prior to the first observation in 2006, by an extensive set of theoretical studies dating back to 1970. Because experimental observations of Efimov physics have usually relied on resonances or interference phenomena in three-body recombination, this connects naturally with the processes of molecule formation in a low temperature gas of atoms or nucleons, and more generally with N-body recombination processes. Some other topics not closely related to the Efimov effect are also reviewed in this article, including ...Comment: review articl

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“…In ultracold homonuclear systems that interact through pairwise −C 6 /r 6 potentials the 3BP is connected to the molecular van der Waals (vdW) tails by an approximate, species-independent constant [12,13]. Apart from slight modifications due to short-range effects [13,14], this general scaling constitutes an example of the so-called vdW universality [15] and can be seen as a precursor to a larger class of universal low-energy threebody observables that are governed by mutual power-law interactions at small particle separations [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Role of the intraspecies scattering length in the Efimov scenario with large mass difference

et al. 2017

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We experimentally and theoretically study the effect of the intraspecies scattering length onto the heteronuclear Efimov scenario, following up on our earlier observation of Efimov resonances in an ultracold Cs-Li mixture for negative [Pires et al., Phys. Rev. Lett. 112, 250404 (2014)] and positive Cs-Cs scattering length [Ulmanis et al., Phys. Rev. Lett. 117, 153201 (2016)]. Three theoretical models of increasing complexity are employed to quantify its influence on the scaling factor and the three-body parameter: a simple Born-Oppenheimer picture, a zero-range theory, and a spinless van der Waals model. These models are compared to Efimov resonances observed in an ultracold mixture of bosonic 133 Cs and fermionic 6 Li atoms close to two Cs-Li Feshbach resonances located at 843 G and 889 G, characterized by different sign and magnitude of the Cs-Cs interaction. By changing the sign and magnitude of the intraspecies scattering length different scaling behaviors of the three-body loss rate are identified, in qualitative agreement with theoretical predictions. The three-body loss rate is strongly influenced by the intraspecies scattering length.

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Finite-temperature effects on a triatomic Efimov resonance in ultracold cesium

Cited by 16 publications

References 52 publications

Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture

Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture

Universal few-body physics and cluster formation

Role of the intraspecies scattering length in the Efimov scenario with large mass difference

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