Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-09-27
Phys. Rev. Lett. 100, 050404 (2008)
Physics
Condensed Matter
Other Condensed Matter
4 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.100.050404
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.
Altman Eitan
Blatter Gianni
Huber Sebastian D.
Theiler B.
No associations
LandOfFree
The Amplitude Mode in the Quantum Phase Model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Amplitude Mode in the Quantum Phase Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Amplitude Mode in the Quantum Phase Model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-482190