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Pairing-gap, pseudogap, and no-gap phases in the radio-frequency spectra of a trapped unitary Li6 gas

P. Pieri, A. Perali, G. C. Strinati, S. Riedl, M. J. Wright, A. Altmeyer, C. Kohstall, E. R. Sánchez Guajardo, J. Hecker Denschlag, and R. Grimm
Phys. Rev. A 84, 011608(R) – Published 25 July 2011
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Abstract

Radio frequency spectra of a trapped unitary Li6 gas are reported and analyzed in terms of a theoretical approach that includes both final-state and trap effects. The different strength of the final-state interaction across the trap is crucial for evidencing two main peaks associated with two distinct phases residing in different trap regions. These are the pairing-gap and pseudo-gap phases below the critical temperature 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 Li6 in a trap is solved.

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  • Received 11 February 2011

DOI:https://doi.org/10.1103/PhysRevA.84.011608

©2011 American Physical Society

Authors & Affiliations

P. Pieri1, A. Perali1, G. C. Strinati1, S. Riedl2,3,*, M. J. Wright2,†, A. Altmeyer2,3,‡, C. Kohstall2, E. R. Sánchez Guajardo2, J. Hecker Denschlag2,§, and R. Grimm2,3

  • 1Dipartimento di Fisica, Università di Camerino, I-62032 Camerino, Italy
  • 2Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck, A-6020 Innsbruck, Austria
  • 3Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, A-6020 Innsbruck, Austria

  • *Present address: Max-Planck-Institut für Quantenoptik, Garching, Germany.
  • Present address: Harvard University, Cambridge, MA, USA.
  • Present address: Deutsche Bahn Mobility Logistics AG, Berlin, Germany.
  • §Present address: Universität Ulm, Germany.

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Issue

Vol. 84, Iss. 1 — July 2011

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