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arXiv:1101.3165 · Computer Physics Communications

Pairing in population imbalanced Fermion systems

Mathew Wolak, V. G. Rousseau, G. G. Batrouni

Published Dec 30, 2010• 2 citations
arXivHTMLPDF
DOI
10.1016/j.cpc.2010.12.032

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We established superfluidity in a two-state mixture of ultracold fermionic atoms with imbalanced state populations. This study relates to the long-standing debate about the nature of the superfluid state in Fermi systems. Indicators for superfluidity were condensates of fermion pairs and vortices in rotating clouds. For strong interactions, near a Feshbach resonance, superfluidity was observed for a broad range of population imbalances. We mapped out the superfluid regime as a function of interaction strength and population imbalance and characterized the quantum phase transition to the normal state, known as the Pauli limit of superfluidity.