2017
DOI: 10.1103/physreva.96.022707
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Enhancing the Efimov correlation in Bose polarons with large mass imbalance

Abstract: We study the effect of Efimov physics (in the few-body sector) to the spectral response of Bose polaron, a many-body system consisting of an impurity immersed in a bath of bosonic atoms. We find that the Efimov correlation can be greatly enhanced by increasing the mass ratio between the bosons and the impurity, which results in visible signatures in the rf spectrum of the polaron. Using a diagrammatic approach up to the third-order virial expansion, we show how the mass imbalance and the enhanced three-body ef… Show more

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Cited by 23 publications
(26 citation statements)
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References 56 publications
(122 reference statements)
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“…It is an expansion in terms of the small fugacity z σ = e βµσ for each component σ. The virial expansion of the single-particle Green function in a spinbalanced Fermi gas was recently developed by Sun and Leyronas [69] and the technique was applied to investigate the Bose polaron at high temperature [70,71]. In this work, we apply the same technique to understand the Fermi polaron at high temperature.…”
Section: B Virial Expansion Theorymentioning
confidence: 99%
“…It is an expansion in terms of the small fugacity z σ = e βµσ for each component σ. The virial expansion of the single-particle Green function in a spinbalanced Fermi gas was recently developed by Sun and Leyronas [69] and the technique was applied to investigate the Bose polaron at high temperature [70,71]. In this work, we apply the same technique to understand the Fermi polaron at high temperature.…”
Section: B Virial Expansion Theorymentioning
confidence: 99%
“…Similarly, recent results in Refs. [42,43] for the Bose polaron problem suggest that when the size of Efimov trimers becomes comparable to the interparticle scaling, signatures of Efimov physics become visible in the polaron spectrum.…”
Section: R→0mentioning
confidence: 99%
“…While the initial theoretical [38,39,[41][42][43][44][45][46][47][48][49][50][51] and experimental [13][14][15][16] work on this problem focused on the effective Fröhlich model valid at weak couplings, it has been realized first in Ref. [28] that additional two-phonon terms need to be included in the Hamiltonian to provide an accurate description of Bose polarons at strong couplings [25][26][27][52][53][54][55][56][57][58][59][60][61][62]. It has been argued recently that, on the attractive side of a Feshbach resonance, two-phonon terms mainly renormalize the effective Fröhlich Hamiltonian describing the Bose polaron [26].…”
Section: Bose Polarons In Bose-einstein Condensatesmentioning
confidence: 99%