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4 papers · 2 filters
Universality of Brunnian (-body Borromean) four and five-body systems
M. T. Yamashita, D. V. Fedorov, A. S. Jensen
We compute binding energies and root mean square radii for weakly bound systems of and identical bosons. Ground and first excited states of an -body system appear belo…
Effective Potential for Ultracold Atoms at the Zero-Crossing of a Feshbach Resonance
N. T. Zinner
We consider finite-range effects when the scattering length goes to zero near a magnetically controlled Feshbach resonance. The traditional effective-range expansion is badly behav…
Parametric amplification of vacuum fluctuations in a spinor condensate
C. Klempt, O. Topic, G. Gebreyesus +6
Parametric amplification of vacuum fluctuations is crucial in modern quantum optics, enabling the creation of squeezing and entanglement. We demonstrate the parametric amplificatio…
Thomas-Fermi Approximation for a Condensate with Higher-order Interactions
M. Thøgersen, N. T. Zinner, A. S. Jensen
We consider the ground state of a harmonically trapped Bose-Einstein condensate within the Gross-Pitaevskii theory including the effective-range corrections for a two-body zero-ran…