Quantum Numbers for Excitations of Bose-Einstein Condensates in 1D Optical Lattices(Condensed Matter : Structure, Mechanical and Thermal Properties)

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概要

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• The excitation spectrum and the band structure of a Bose-Einstein condensate in a periodic potential are investigated. Analyses within full 3D systems, finite 1D systems, and ideal periodic 1D systems are compared. We find two branches of excitations in the spectra of the finite 1D model. The band structures for the first and (part of) the second band are compared between a finite 1D and the fully periodic 1D systems, utilizing a new definition of an effective wavenumber and a phase-slip number. The upper and lower edges of the first gap coincide well between the two cases. The remaining difference is explained by the existence of the two branches due to the finite-size effect.

• 社団法人日本物理学会の論文
• 2004-11-15

著者

• Salomaa Martti

  Materials Physics Laboratory Helsinki University Of Technology:department Of Physics Kinki Universit

• ISOSHIMA Tomoya

  Materials Physics Laboratory, Helsinki University of Technology

• Isoshima T

  Department Of Physics Okayama University

関連論文

• Quantum Vortex in a Spinor Bose-Einstein Condensate : Condensed Matter: Structure, etc.
• Double Phase Transitions in Magnetized Spinor Bose-Einstein Condensation : Condensed Matter: Structure, etc.
• Quantum Numbers for Excitations of Bose-Einstein Condensates in 1D Optical Lattices(Condensed Matter : Structure, Mechanical and Thermal Properties)
• Quantum Numbers for Excitations of Bose-Einstein Condensates in 1D Optical Lattices(Condensed Matter : Structure, Mechanical and Thermal Properties)

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