Supersolid state of ultracold fermions in an optical lattice

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dc.creatorKoga, Akihisa
dc.creatorHigashiyama, Takuji
dc.creatorInaba, Kensuke
dc.creatorSuga, Seiichiro
dc.creatorKawakami, Norio
dc.date2008-04-09
dc.date2008-06-25
dc.date.accessioned2026-07-07T09:46:19Z
dc.date.available2026-07-07T09:46:19Z
dc.descriptionWe study ultracold fermionic atoms trapped in an optical lattice with harmonic confinement by means of the dynamical mean-field approximation. It is demonstrated that a supersolid state, where an s-wave superfluid coexists with a density-wave state with a checkerboard pattern, is stabilized by attractive onsite interactions on a square lattice. Our new finding here is that a confining potential plays an invaluable role in stabilizing the supersolid state. We establish a rich phase diagram at low temperatures, which clearly shows how the insulator, the density wave and the superfluid compete with each other to produce an intriguing domain structure. Our results shed light on the possibility of the supersolid state in fermionic optical lattice systems.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0804.1547
dc.identifierhttp://arxiv.org/abs/0804.1547
dc.identifierJ. Phys. Soc. Jpn. 77, 073602 (2008)
dc.identifierdoi:10.1143/JPSJ.77.073602
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163488
dc.subjectSuperconductivity
dc.titleSupersolid state of ultracold fermions in an optical lattice
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