Roton-Maxon Spectrum and Stability of Trapped Dipolar Bose-Einstein Condensates

2003/01/24 by L. Santos, G. V. Shlyapnikov, Maciej Lewenstein +1 · 10 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dipole #Excitation #Instability #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Roton #Spectrum (functional analysis) #Superfluid helium-4 #Superfluidity #cond-mat

paper · pdf · doi:10.1103/physrevlett.90.250403

4 pages, 2 ps figures

arxiv created 2003/01/24 · openalex publication_date 2003/06/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We find that pancake dipolar condensates can exhibit a roton-maxon character of the excitation spectrum, so far observed only in superfluid helium. We also obtain a condition for the dynamical stability of these condensates. The spectrum and the border of instability are tunable by varying the particle density and/or the confining potential. This opens wide possibilities for manipulating the superfluid properties of dipolar condensates.

Citations

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Ground state and elementary excitations of single and binary Bose-Einstein condensates of trapped dipolar gases
• Bose-Einstein condensation with magnetic dipole-dipole forces
• Probing dipolar effects with condensate shape oscillation
• Quantum Phases of Dipolar Bosons in Optical Lattices
• Ferromagnetism in a Lattice of Bose-Einstein Condensates

Cited by

• Dark Superradiance in Cavity-Coupled Polar Molecular Bose-Einstein Condensates
• Faraday pattern formation in dipolar superfluid and supersolid quantum gases
• Excitations and anisotropic sound in planar dipolar supersolids with tilted dipoles
• Attractive interactions, molecular complexes, and polarons in coupled dipolar exciton fluids
• Excitation spectrum of a toroidal spin-1 Bose-Einstein condensate
• Half-Quantum Vortex Molecules in a Binary Dipolar Bose Gas
• Expansion dynamics of a dipolar Bose-Einstein condensate
• Self-Organization of Light in Optical Media with Competing Nonlinearities
• An effective many-body theory for strongly interacting polar molecules
• Anisotropic sound and shock waves in dipolar Bose–Einstein condensate