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23 papers · 1 filter
Controlled vortex-sound interactions in atomic Bose-Einstein condensates
N. G. Parker, N. P. Proukakis, C. F. Barenghi +1
The low temperature dynamics of a vortex in a trapped quasi-two-dimensional Bose-Einstein condensate are studied quantitatively. Precession of an off-centred vortex in a dimple tra…
Dirac quasinormal modes of the Reissner-Nordström de Sitter black hole
Jiliang Jing
The quasinormal modes of the Reissner-Nordström de Sitter black hole for the massless Dirac fields are studied using the Pöshl-Teller potential approximation. We find that the magn…
Can the "brick wall" model present the same results in different coordinate representations?
Jiliang Jing
By using the 't Hooft's "brick wall" model and the Pauli-Villars regularization scheme we calculate the statistical-mechanical entropies arising from the quantum scalar field in di…
Dynamical instability of a dark soliton in a quasi-one-dimensional Bose-Einstein condensate perturbed by an optical lattice
N. G. Parker, N. P. Proukakis, C. F. Barenghi +1
The motion of a dark soliton is investigated in a one-dimensional dilute Bose-Einstein condensate confined in a harmonic trap and an optical lattice. The harmonic trap induces a dy…
The failure of rational dilation on a triply connected domain
Michael A. Dritschel, Scott McCullough
For R a bounded triply connected domain with boundary consisting of disjoint Jordan loops there exists an operator T on a complex Hilbert space H so that the closure of R is a spec…
The magnetic field of M31 from multi-wavelength radio polarization observations
A. Fletcher, E. M. Berkhuijsen, R. Beck +1
The configuration of the regular magnetic field in M31 is deduced from radio polarization observations at the wavelengths 6, 11 and 20 cm. By fitting the observed azimuthal distrib…