Phonon-like excitations in the two-state Bose-Hubbard model
The spectrum of phonon-like collective excitations in the system of Bose-atoms in optical lattice (more generally, in the system of quantum particles described by the Bose-Hubbard model) is investigated. Such excitations appear due to displacements of particles with respect to their local equilibriu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Institute for Condensed Matter Physics
2015-12-01
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| Series: | Condensed Matter Physics |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.5488/CMP.18.43004 |