Roton excitations in a trapped dipolar Bose-Einstein condensate
arXiv:1308.5812 · doi:10.1103/PhysRevA.88.043606
Abstract
We consider the quasi-particle excitations of a trapped dipolar Bose-Einstein condensate. By mapping these excitations onto radial and angular momentum we show that the roton modes are clearly revealed as discrete fingers in parameter space, whereas the other modes form a smooth surface. We examine the properties of the roton modes and characterize how they change with the dipole interaction strength. We demonstrate how the application of a perturbing potential can be used to engineer angular rotons, i.e. allowing us to controllably select modes of non-zero angular momentum to become the lowest energy rotons.
8 pages, 6 figures
References in corpus (18)
- Bose-Einstein condensation of chromium
- Bose-Einstein Condensation of Erbium
- Quantum degenerate dipolar Fermi gas
- d-wave collapse and explosion of a dipolar Bose-Einstein condensate
- Radial and angular rotons in trapped dipolar gases
- Bogoliubov modes of a dipolar condensate in a cylindrical trap
- Roton spectroscopy in a harmonically trapped dipolar Bose-Einstein condensate
- Dipolar Bose-Einstein condensates at Finite temperature
- Finite temperature analysis of a quasi2D dipolar gas
- Stability and structure of an anisotropically trapped dipolar Bose-Einstein condensate: angular and linear rotons
- Critical Temperature of Weakly Interacting Dipolar Condensates
- Depletion and fluctuations of a trapped dipolar Bose-Einstein condensate in the roton regime
- Finite-temperature trapped dipolar Bose gas
- Anisotropic Coherence properties in a trapped quasi2D dipolar gas
- Geometric Stability Spectra of Dipolar Bose Gases in Tunable Optical Lattices
- Time-of-Flight Roton Spectroscopy in Dipolar Bose-Einstein Condensates
- Correlations of quasi-2D dipolar ultracold gas at finite temperatures
- Geometric scale invariance as a route to macroscopic degeneracy: loading a toroidal trap with a Bose or Fermi gas
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- Two-Dimensional Supersolid Formation in Dipolar Condensates
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- Pattern Formation in Quantum Ferrofluids: from Supersolids to Superglasses
- Roton Excitations in an Oblate Dipolar Quantum Gas
- Self-bound dipolar droplets and supersolids in molecular Bose-Einstein condensates
- Supersolidity in Two-Dimensional Trapped Dipolar Droplet Arrays
- Properties of a dipolar condensate with three-body interactions
- Anisotropic Superfluid Behavior of a Dipolar Bose-Einstein Condensate
- Quantum droplets of quasi-one-dimensional dipolar Bose-Einstein condensates
- A general theory of flattened dipolar condensates
- Dispersion relation and excitation character of a two-component Bose-Einstein condensate
- Dissipative Preparation of Spatial Order in Rydberg-Dressed Bose-Einstein Condensates
- Enhanced quantum spin fluctuations in a binary Bose-Einstein condensate
- Number Fluctuations of a Dipolar Condensate: Anisotropy and Slow Approach to the Thermodynamic Regime
- Thermally activated local collapse of a flattened dipolar condensate
- Induced supersolidity and hypersonic flow of a dipolar Bose-Einstein Condensate in a rotating bubble trap
- Induced supersolidity in a Dy-Er mixture
- Dispersion relations and self-localization of quasiparticles in coupled elongated Bose-Einstein condensates
- Temperature-induced supersolidity in spin-orbit-coupled Bose gases
- New opportunites for interactions and control with ultracold lanthanides
- Roton in a few-body dipolar system
- Finite resolution fluctuation measurements of a trapped Bose-Einstein condensate
- Ramifications of topology and thermal fluctuations in quasi-2D condensates
- Bogoliubov spectrum and the dynamic structure factor in a quasi-two-dimensional spin-orbit coupled BEC
- Roadmap to vortex nucleation below critical rotation frequency in a dipolar Bose-Einstein condensate
- Excitations and anisotropic sound in planar dipolar supersolids with tilted dipoles
- Quasiparticle spectra of mixtures of dipolar and non-dipolar condensates at zero and finite temperatures
- Electric-Field Control of Josephson Oscillations in Dipolar Bose-Einstein Condensates