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119 papers · 1 filter
Chaotic dynamics of a Bose-Einstein condensate coupled to a qubit
J. Martin, B. Georgeot, D. L. Shepelyansky
We study numerically the coupling between a qubit and a Bose-Einstein condensate (BEC) moving in a kicked optical lattice, using Gross-Pitaevskii equation. In the regime where the…
A multiwavelength investigation of the massive eclipsing binary Cyg OB2 #5
N. Linder, G. Rauw, J. Manfroid +5
The properties of the early-type binary Cyg OB2 #5 have been debated for many years and spectroscopic and photometric investigations yielded conflicting results. We have attempted…
On the origin of macroturbulence in hot stars
C. Aerts, J. Puls, M. Godart +1
Since the use of high-resolution high signal-to-noise spectroscopy in the study of massive stars, it became clear that an ad-hoc velocity field at the stellar surface, termed macro…
Tests of achromatic phase shifters performed on the SYNAPSE test bench: a progress report
Pavel Gabor, Peter A. Schuller, Bruno Chazelas +16
The achromatic phase shifter (APS) is a component of the Bracewell nulling interferometer studied in preparation for future space missions (viz. Darwin/TPF-I) focusing on spectrosc…
How precisely will the total cross section be measured at the LHC?
J. -R. Cudell, O. V. Selyugin
It is very likely that hadronic scattering will enter a new regime at the LHC, as the black-disk limit is reached. This will lead to a severe change in the t dependence of the real…
Redshifts and lens profile for the double quasar QJ 0158-4325
C. Faure, T. Anguita, A. Eigenbrod +5
We report on the redshift of the lensing galaxy and of the quasar QJ 0158-4325 and on the lens model of the system. A deep VLT/FORS2 spectrum and HST/NICMOS-F160W images are deconv…