Pairing Without Superfluidity: The Ground State of an Imbalanced Fermi Mixture
نویسندگان
چکیده
منابع مشابه
Pairing without superfluidity: the ground state of an imbalanced Fermi mixture.
We used radio-frequency spectroscopy to study pairing in the normal and superfluid phases of a strongly interacting Fermi gas with imbalanced spin populations. At high spin imbalances, the system does not become superfluid even at zero temperature. In this normal phase, full pairing of the minority atoms was observed. Hence, mismatched Fermi surfaces do not prevent pairing but can quench the su...
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where abg = 63.0 a0 is the background scattering length, ∆ = 0.88 G is the width, and B0 is the center of the resonance near 154.7 G. As we already pointed out in Ref. [2], the optical trap induces a differential light shift between the atom pair state and the molecular state. This leads to a lightinduced shift of the FR center. For the experiments presented in the main text, we use a near-infr...
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We investigate a mixture of ultracold fermionic K40 atoms and weakly bound Li6K40 dimers on the repulsive side of a heteronuclear atomic Feshbach resonance. By radio-frequency spectroscopy we demonstrate that the normally repulsive atom-dimer interaction is turned into a strong attraction. The phenomenon can be understood as a three-body effect in which two heavy K40 fermions exchange the light...
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Article history: Accepted 2 November 2009 Available online xxxx PACS: 03.75.Hh 03.75.Ss 74.20. z
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The search for novel phases of quantum coherent matter has been one of the main driving forces in condensed matter physics for many years. The unprecedented experimental sophistication reached recently in ultracold atomic gases has opened new and exciting perspectives in this search. The ability to externally manipulate the interatomic interaction, the capacity to embed atomic clouds in optical...
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ژورنال
عنوان ژورنال: Science
سال: 2007
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.1140749