The Amplitude Mode in the Quantum Phase Model
| dc.creator | Huber, S. D. | |
| dc.creator | Theiler, B. | |
| dc.creator | Altman, E. | |
| dc.creator | Blatter, G. | |
| dc.date | 2007-09-27 | |
| dc.date | 2008-02-08 | |
| dc.date.accessioned | 2026-07-07T09:19:10Z | |
| dc.date.available | 2026-07-07T09:19:10Z | |
| dc.description | We derive the collective low energy excitations of the quantum phase model of interacting lattice bosons within the superfluid state using a dynamical variational approach. We recover the well known sound (or Goldstone) mode and derive a gapped (Higgs type) mode that was overlooked in previous studies of the quantum phase model. This mode is relevant to ultracold atoms in a strong optical lattice potential. We predict the signature of the gapped mode in lattice modulation experiments and show how it evolves with increasing interaction strength. | |
| dc.description | 4 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/0709.4436 | |
| dc.identifier | http://arxiv.org/abs/0709.4436 | |
| dc.identifier | Phys. Rev. Lett. 100, 050404 (2008) | |
| dc.identifier | doi:10.1103/PhysRevLett.100.050404 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/154290 | |
| dc.subject | Other Condensed Matter | |
| dc.title | The Amplitude Mode in the Quantum Phase Model | |
| dc.type | text |