Evidence for an Excited-State Efimov Trimer in a Three-Component Fermi Gas

Williams, Jason; Hazlett, E.L.; Huckans, John; Stites, Ronald W.; Zhang, Y.; O’Hara, K. M.

doi:10.1103/physrevlett.103.130404

Cited by 172 publications

(194 citation statements)

References 35 publications

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“…The scattering length has a pole at resonance, corresponding to a two-body bound state exactly at threshold. Signatures of Efimov states were first observed in an ultracold gas of cesium atoms [7] and have since been found in many other systems, including other bosonic gases [8][9][10][11][12][13], three-component fermionic spin mixtures [14][15][16][17], and mixtures of atomic species [18][19][20][21]. Moreover, extensions of the Efimov scenario to universal states of larger clusters [22][23][24] have been demonstrated in experiments [9,25,26], highlighting the general nature of universal few-body physics.…”

Section: Introductionmentioning

confidence: 94%

“…In this extreme regime, an excited Efimov state exists [16]. This trimer state crosses the three-atom threshold near 900 G and leads to a strong enhancement of three-body recombination.…”

Section: Lithium-6mentioning

confidence: 99%

“…V, we present a refined analysis of the excited-state resonance observed in Ref. [16]. This gives a high-precision value for the 3BP in 6 Li, which deviates significantly from those found in other atomic systems.…”

Section: Introductionmentioning

confidence: 99%

“…After a spatial integration of losses over the density profile of the trapped cloud, the loss rate coefficient L 3 can be experimentally determined by fitting the time-dependent decay of the total atom numbers [14][15][16]. Efimov states show up as distinct loss resonances [36] when they couple to the three-atom threshold.…”

Section: B Three-body Recombinationmentioning

confidence: 99%

“…They require extremely low temperatures for experimental observation since the recombination peaks are less well defined when the de Broglie wavelengths are shorter than the scattering lengths [7,40,41]. Excited-state resonances have therefore been observed in only a very few experiments carried out with 6 Li [16], with 133 Cs [42], and with mixtures of 6 Li and 133 Cs [20,21]. Quantitative understanding of these resonances requires both very precise knowledge of the two-body scattering properties and an accurate theoretical description of finite-temperature effects.…”

Section: Introductionmentioning

confidence: 99%

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Three-body parameter for Efimov states inLi6

O’Hara

Grimm

et al. 2014

Phys. Rev. A

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. (2014) 'Three-body parameter for E mov states in 6Li. ', Physical review A., 90 (4). 043636.Further information on publisher's website:http://dx.doi.org/10.1103/PhysRevA.90.043636Publisher's copyright statement:Reprinted with permission from the American Physical Society: Bo Huang (), Kenneth M. O'Hara, Rudolf Grimm, Jeremy M. Hutson, and Dmitry S. Petrov (2014) 'Three-body parameter for E mov states in 6Li.', Physical review A., 90 (4), 043636. c 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modi ed, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We present a state-of-the-art reanalysis of experimental results on Efimov resonances in the three-fermion system of 6 Li. We discuss different definitions of the three-body parameter (3BP) for Efimov states and adopt a definition that excludes effects due to deviations from universal scaling for low-lying states. We develop a finite-temperature model for the case of three distinguishable fermions and apply it to the excited-state Efimov resonance to obtain the most accurate determination to date of the 3BP in an atomic three-body system. Our analysis of ground-state Efimov resonances in the same system yields values for the three-body parameter that are consistent with the excited-state result. Recent work has suggested that the reduced 3BP for atomic systems is a near-universal quantity, almost independent of the particular atom involved. However, the value of the 3BP obtained for 6 Li is significantly (∼20%) different from that previously obtained from the excited-state resonance in Cs. The difference between these values poses a challenge for theory.

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Section: Introductionmentioning

confidence: 94%

“…In this extreme regime, an excited Efimov state exists [16]. This trimer state crosses the three-atom threshold near 900 G and leads to a strong enhancement of three-body recombination.…”

Section: Lithium-6mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: B Three-body Recombinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three-body parameter for Efimov states inLi6

O’Hara

Grimm

et al. 2014

Phys. Rev. A

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Optical Control of Cold Atoms and Artificial Electromagnetism

Juzeliūnas

Öhberg

2015

Photonics

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Near Threshold Effects on Recombination and Vibrational Relaxation in Efimov Systems

2016

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We investigate the energy dependence of inelastic processes in systems which possess Efimov states. We consider the three-body recombination rate K3 where three free atoms interact to produce an atom-dimer pair, and the relaxation rate K rel where an atom quenches a weakly bound state of a dimer near an Efimov resonance to more deeply bound levels. Using a model capturing the key features of the Efimov problem, we identify new energy regimes for K3, namely the NTR (Near Threshold Resonance) regime behavior E −2 for negative scattering lengths and the NTS (Near Threshold Suppression) regime behavior E 2 for positive scattering lengths. We also confirm a previously found oscillatory behavior of K3 at higher energy E. Finally, we find that K rel behaves as E −1 in the NTR regime.

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Evidence for an Excited-State Efimov Trimer in a Three-Component Fermi Gas

Cited by 172 publications

References 35 publications

Three-body parameter for Efimov states inLi6

Three-body parameter for Efimov states inLi6

Optical Control of Cold Atoms and Artificial Electromagnetism

Near Threshold Effects on Recombination and Vibrational Relaxation in Efimov Systems

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