論文

査読有り
2008年7月

Supersolid state of ultracold fermions in optical lattice

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Akihisa Koga
  • ,
  • Takuji Higashiyama
  • ,
  • Kensuke Inaba
  • ,
  • Seiichiro Suga
  • ,
  • Norio Kawakami

77
7
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1143/JPSJ.77.073602
出版者・発行元
PHYSICAL SOC JAPAN

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.

リンク情報
DOI
https://doi.org/10.1143/JPSJ.77.073602
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000257833400003&DestApp=WOS_CPL
ID情報
  • DOI : 10.1143/JPSJ.77.073602
  • ISSN : 0031-9015
  • Web of Science ID : WOS:000257833400003

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