Coherent State Combined with Mixed State for an Imperfect Boson System II : Static Solution and Elementary Excitation(Nuclear Physics)
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The thermal equilibrium state and elementary modes of excitation are investigated for a spinless boson system with a contact interaction. In a homogeneous infinite system, the elementary mode associated with the bose condensation with 0 momentum is automatically damped. In a semi-infinite cubic system, there appear bound states in the semi-infinite direction for a free end condition on the finite side and then two-dimensional modes with a phonon-like spectrum.
- 理論物理学刊行会の論文
- 2005-06-25
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