Phase Separation and Collective Excitations of Two-Component Bose-Einstein Condensates in Traps : General Physics
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概要
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The phase separation and collective excitations of two-component Bose-Einstein condensates in traps are studied. Using the variational method, we show that the separated state is favorable in the case where the interspecies interaction is strongly repulsive and the number of atoms is large enough. This phase separation condition is explained in terms of the softening of a dipole mode collective excitation. Other low-lying excitation modes and their softenings which lead to the instability of the mixed state are also studied by use of the sum-rule approach.
- 社団法人日本物理学会の論文
- 2000-08-15
著者
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Miki Wadati
Department Of Physics Graduate School Of Science University Of Tokyo
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Wadati M
Univ. Tokyo
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Wadati M
Univ. Tsukuba
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Wadati M
Tokyo Univ. Sci. Tokyo
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Wadati Miki
Department Of Physics Faculty Of Science University Of Tokyo
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Wadati Miki
Department Of Physics Graduate School Science University Of Tokyo
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MORISE Hirofumi
Department of Physics, Graduate School of Science, University of Tokyo
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Morise Hirofumi
Department Of Physics Graduate School Of Science University Of Tokyo
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Wadati Miki
Department Of Physics Faculty Of Science Tokyo University Of Science
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WADATI Miki
Institute of Physics, College of Arts and Sciences University of Tokyo
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WADATI Miki
Institute of Applied Physics, University of Tsukuba
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