Supersolid State of Ultracold Fermions in Optical Lattice(Condensed matter: structure and mechanical and thermal properties)
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概要
- 論文の詳細を見る
We study ultracold fermionic atoms trapped in an optical lattice with harmonic confinement by 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 an insulator, a density wave and a superfluid compete with each other to produce an interesting domain structure. Our results shed light on the possibility of the supersolid state in fermionic optical lattice systems.
- 社団法人日本物理学会の論文
- 2008-07-15
著者
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KOGA Akihisa
Department of Applied Physics, Osaka University
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Koga Akihisa
Department Of Applied Physics Osaka University
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KAWAKAMI Norio
Department of Applied Physics, Osaka University
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Kawakami Norio
Department Of Physics Kyoto University:department Of Applied Physics Osaka University
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Kawakami Norio
Department Of Applied Physics Osaka University
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Suga Seiichiro
Department of Applied Physics, Osaka University
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HIGASHIYAMA Takuji
Department of Applied Physics, Osaka University
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INABA Kensuke
Department of Applied Physics, Osaka University
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Higashiyama Takuji
Department Of Applied Physics Osaka University
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Inaba Kensuke
Department Of Applied Physics Osaka University
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Suga Sei‐ichiro
Department Of Applied Physics Osaka University
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Suga Seiichiro
Department Of Applied Physics Osaka University
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Koga Akihisa
Department of Physics, Kyoto University
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Kawakami Norio
Department of Physics, Kyoto University:Department of Applied Physics, Osaka University
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