Time-of-Flight Roton Spectroscopy in Dipolar Bose-Einstein Condensates
arXiv:1307.6004 · doi:10.1103/PhysRevA.88.025603
Abstract
Dipolar Bose-Einstein condensates may present a rotonlike dispersion minimum, which has yet to be observed in experiments. We discuss a simple method to reveal roton excitations, based on the response of quasi-two-dimensional dipolar condensates against a weak lattice potential. By employing numerical simulations for realistic scenarios, we analyze the response of the system as a function of both the lattice spacing and the s-wave scattering length, showing that the roton minimum may be readily revealed in current experiments by the resonant population of Bragg peaks in time-of-flight measurements.
5 pages, 5 figures
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Cited by in corpus (11)
- Dipolar physics: A review of experiments with magnetic quantum gases
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- Roton excitations in a trapped dipolar Bose-Einstein condensate
- Variational theory for the ground state and collective excitations of an elongated dipolar condensate
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- Ultralong-range order in the Fermi-Hubbard model with long-range interactions
- Quantum fluctuations and Gross-Pitaevskii theory
- Static-response theory and the roton-maxon spectrum of a flattened dipolar Bose-Einstein condensate
- Finite resolution fluctuation measurements of a trapped Bose-Einstein condensate
- Anisotropic merging and splitting of dipolar Bose-Einstein condensates