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Observation of Spin-Polarons in a tunable Fermi liquid

André Schirotzek, Cheng-Hsun Wu, Ariel Sommer +1 more

Bulletin of the American Physical SocietyMay 21, 20090 citations

Doping two-dimensional Fermi-Hubbard systems from polaronic metal to Fermi liquid

Sarah Hirthe, Joannis Koepsell, Dominik Bourgund +8 more

Bulletin of the American Physical SocietyJun 2, 20210 citations

Quasiparticles and Polaronic Effects in Crystals, Fermi Gasses and Fermi Liquids

Y. M. Malozovsky, J. D. Fan

Journal of Superconductivity and Novel MagnetismFeb 5, 20106 citations

Observation of Spin-Polarons in a strongly interacting Fermi liquid

Martin W. Zwierlein

Bulletin of the American Physical SocietyMar 16, 20090 citations

Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms

André Schirotzek, Cheng-Hsun Wu, Ariel Sommer +1 more

We have observed Fermi polarons, dressed spin-down impurities in a spin-up Fermi sea of ultracold atoms. The polaron manifests itself as a narrow peak in the impurities' rf spectrum that emerges from a broad incoherent background. We determine the polaron energy and the quasiparticle residue for various interaction strengths around a Feshbach resonance. At a critical interaction, we observe the transition from polaronic to molecular binding. Here, the imbalanced Fermi liquid undergoes a phase transition into a Bose liquid, coexisting with a Fermi sea.We have observed Fermi polarons, dressed spin-down impurities in a spin-up Fermi sea of ultracold atoms. The polaron manifests itself as a narrow peak in the impurities' rf spectrum that emerges from a broad incoherent background. We determine the polaron energy and the quasiparticle residue for various interaction strengths around a Feshbach resonance. At a critical interaction, we observe the transition from polaronic to molecular binding. Here, the imbalanced Fermi liquid undergoes a phase transition into a Bose liquid, coexisting with a Fermi sea.

arXiv:0902.3021Physical Review LettersJun 8, 2009635 citations

Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms

Ariel Sommer, Cheng-Hsun Wu, Martin W. Zwierlein +1 more

We have observed Fermi polarons, dressed spin-down impurities in a spin-up Fermi sea of ultracold atoms. The polaron manifests itself as a narrow peak in the impurities’ rf spectrum that emerges from a broad incoherent background. We determine the polaron energy and the quasiparticle residue for various interaction strengths around a Feshbach resonance. At a critical interaction, we observe the transition from polaronic to molecular binding. Here, the imbalanced Fermi liquid undergoes a phase transition into a Bose liquid, coexisting with a Fermi sea.We have observed Fermi polarons, dressed spin-down impurities in a spin-up Fermi sea of ultracold atoms. The polaron manifests itself as a narrow peak in the impurities’ rf spectrum that emerges from a broad incoherent background. We determine the polaron energy and the quasiparticle residue for various interaction strengths around a Feshbach resonance. At a critical interaction, we observe the transition from polaronic to molecular binding. Here, the imbalanced Fermi liquid undergoes a phase transition into a Bose liquid, coexisting with a Fermi sea.

APS Division of Atomic, Molecular and Optical Physics Meeting AbstractsJun 1, 20090 citations

Phase transformations of the polaronic Fermi-liquid

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