Superfluid-Mott Insulator Transition of Spin-1 Bosons in Optical Lattice under Magnetic Field(Condensed matter: structure and mechanical and thermal properties)
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概要
- 論文の詳細を見る
We study the first- and second-order superfluid-Mott insulator transitions of spin-1 bosons in an optical lattice under a magnetic field by the Gutzwiller approximation. We find that, in contrast to previous perturbative studies, the phase boundary curve continuously changes as a function of magnetic field. We also find a sharp cusp structure on the phase boundary curve under some circumstances. When the phase boundary curve deviates from that obtained with the perturbative studies, the phase transition is a first-order one. We further clarify the specific features of the phase transition in the present system. The order parameters exactly at the boundary point, where the transition changes from first to second order, remain finite under a finite magnetic field and continuously vanish as the magnetic field approaches zero.
- 社団法人日本物理学会の論文
- 2006-07-15
著者
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Kimura Takashi
Department of Neurology, National Douhoku Hospital
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Yamashita Makoto
NTT Basic Research Laboratories
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Kurihara Susumu
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo:(present Address) The I
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Yamashita Makoto
Ntt Basic Research Laboratories Ntt Corporation
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TSUCHIYA Shunji
Institute of Industrial Science, University of Tokyo
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Kimura Takashi
Department Of Medicine And Molecular Science Division Of Frontier Medical Science Programs For Biome
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Kimura Takashi
Department Of Information Sciences Kanagawa University
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Kimura Takashi
Department Of Comparative Pathology Faculty Of Veterinary Medicine Hokkaido University
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Tsuchiya Shunji
Institute Of Industrial Science University Of Tokyo:bec-cnr-infm And Dipartimento Di Fisica Universita Di Trento
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KIMURA Takashi
Department of Cardiovascular, Respiratory and Metabolic Medicine Graduate School of Medicine, Kagoshima University
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