Energy gaps and roton structure above the nu=1/2 Laughlin state of a rotating dilute Bose-Einstein condensate
arXiv:cond-mat/0310402 · doi:10.1103/PhysRevLett.91.140401
Abstract
Exact diagonalization study of a rotating dilute Bose-Einstein condensate reveals that as the first vortex enters the system the degeneracy of the low-energy yrast spectrum is lifted and a large energy gap emerges. As more vortices enter with faster rotation, the energy gap decreases towards zero, but eventually the spectrum exhibits a rotonlike structure above the nu=1/2 Laughlin state without having a phonon branch despite the short-range nature of the interaction.
arXiv comment4 pages, 4 figures, 1 table
References in corpus (20)
- Stable 85Rb Bose-Einstein Condensates with Widely Tunable Interactions
- Driving Bose-Einstein condensate vorticity with a rotating normal cloud
- Vortex nucleation in Bose-Einstein condensates in an oblate, purely magnetic potential
- Condensation of `composite bosons' in a rotating BEC
- Bose-Einstein Condensates with Large Number of Vortices
- Do attractive bosons condense?
- Nonequilibrium effects of anisotropic compression applied to vortex lattices in Bose-Einstein condensates
- Towards a field theory of the fractional quantum Hall states
- Band Structure of the Fractional Quantum Hall Effect
- Yrast line for weakly interacting trapped bosons
- The Yrast Spectra of Weakly Interacting Bose-Einstein Condensates
- Weakly-interacting Bose-Einstein condensates under rotation
- Critical rotation of a harmonically trapped Bose gas
- Rotational spectra of weakly interacting Bose-Einstein condensates
- Composite-Fermion Picture for the Spin-Wave Excitation in the fractional quantum Hall system
- Low-Lying Excitations from the Yrast Line of Weakly Interacting Trapped Bosons
- Low-lying excitations of a trapped rotating Bose-Einstein condensate
- Operator-Algebraic Approach to the Yrast Spectrum of Weakly Interacting Trapped Bosons
- Perturbative spectrum of Trapped Weakly Interacting Bosons in Two Dimensions
- Analytical Results for Trapped Weakly Interacting Bosons in Two Dimensions
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- Complex Langevin simulation of quantum vortices in a Bose-Einstein condensate
- Vortices in Bose-Einstein condensates - finite-size effects and the thermodynamic limit
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- Roton minimum at filled fractional quantum Hall effect of Bose particles
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