Abstract
We determine the superfluid transition temperatures ${T}_{c}$ and the ground states of the attractive Hubbard model and find unusual insulating phases associated with noninteger filling at sufficiently strong pairing attraction $\ensuremath{\mid}U\ensuremath{\mid}$. These states, distinct from the band-and Mott-insulating phases, derive from pair localization; pair hopping at large $\ensuremath{\mid}U\ensuremath{\mid}$ and high densities is impeded by intersite, interpair repulsive interactions. The best way to detect the breakdown of superfluidity is by using fermionic optical lattices, which should reveal these unusual forms of ``bosonic'' order, reflecting ground-state pairing without condensation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
