Detecting phonons and persistent currents in toroidal Bose-Einstein condensates by means of pattern formation
arXiv:cond-mat/0605183 · doi:10.1103/PhysRevA.74.061601
Abstract
We theoretically investigate the dynamic properties of a Bose-Einstein condensate in a toroidal trap. A periodic modulation of the transverse confinement is shown to produce a density pattern due to parametric amplification of phonon pairs. By imaging the density distribution after free expansion one obtains i) a precise determination of the Bogoliubov spectrum and ii) a sensitive detection of quantized circulation in the torus. The parametric amplification is also sensitive to thermal and quantum fluctuations.
4 pages, 4 figures; new figures, revised version to appear as a Rapid Communication in Physical Review A
References in corpus (1)
Cited by in corpus (9)
- Dynamics and statistical mechanics of ultra-cold Bose gases using c-field techniques
- Cosmological particle production in emergent rainbow spacetimes
- The Quantum de Laval Nozzle: stability and quantum dynamics of sonic horizons in a toroidally trapped Bose gas containing a superflow
- Faraday waves in elongated superfluid fermionic clouds
- Mixing-demixing transition and collapse of a vortex state in a quasi-two-dimensional boson-fermion mixture
- Analogy electromagnetism-acoustics: Validation and application to local impedance active control for sound absorption
- Effects of Axial Vorticity in Elongated Mixtures of Bose-Einstein Condensates
- Soliton response to transient trap variations
- Scale invariant thermodynamics of a toroidally trapped Bose gas