Excitation Spectra of Bose-Einstein Condensates in Optical Lattice
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- Ichioka Masanori
- Department of Physics, Okayama University
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- Machida Kazushige
- Department of Physics, Okayama University
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Abstract
The excitation spectra of Bose–Einstein condensates are investigated in a three-dimensional optical lattice by the Bogoliubov theory considering the original sinusoidal potential for the optical lattice. When the lattice potential becomes high, the excitations show softening at large wavelengths, suggesting the breakdown of superfluidity. We also study the filling and interaction dependences of the properties of the excitation spectra and one-dimensional lattice case.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 72 (9), 2137-2140, 2003
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204187408768
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- NII Article ID
- 110001974295
- 210000104405
- 130004538468
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- NII Book ID
- AA00704814
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- BIBCODE
- 2003JPSJ...72.2137I
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 6684748
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed