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Pairing-gap, pseudo-gap, and no-gap phases in rf spectra of a trapped unitary 6Li gas

Pairing-gap, pseudo-gap, and no-gap phases in rf spectra of a trapped unitary 6Li gas,P. Pieri,A. Perali,G. C. Strinati,S. Riedl,M. J. Wright,A. Altme

Pairing-gap, pseudo-gap, and no-gap phases in rf spectra of a trapped unitary 6Li gas  
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Radio frequency spectra of a trapped unitary 6Li gas are reported and analyzed in terms of a theoretical approach that includes both final-state and trap effects. Final-state effects play a crucial role in evidencing two main peaks both above and below the critical temperature Tc as being associated with two distinct phases that reside in different trap regions. These are the pairing-gap and pseudo-gap phases below Tc, which evolve into the pseudo-gap and no-gap phases above Tc. In this way, a long standing puzzle about the interpretation of rf spectra for 6Li in a trap is solved.
Published in 2011.
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