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39 papers · 1 filter
Semiclassical Dynamics with Exponentially Small Error Estimates
George A. Hagedorn, Alain Joye
We construct approximate solutions to the time--dependent Schrödinger equation for small values of . If satis…
Adiabatic Evolution for Systems with Infinitely many Eigenvalue Crossings
A. Joye, F. Monti, S. Guerin +1
We formulate an adiabatic theorem adapted to models that present an instantaneous eigenvalue experiencing an infinite number of crossings with the rest of the spectrum. We give an…
NMR imaging of the soliton lattice profile in the spin-Peierls compound CuGeO_3
M. Horvatic, Y. Fagot Revurat, C. Berthier +2
In the spin-Peierls compound CuGeO, the commensurate-incommensurate transition concerning the modulation of atomic position and the local spin-polarization is fully monitored…
The Accretion of Brown Dwarfs and Planets by Giant Stars -- I. AGB Stars
Lionel Siess, Mario Livio
We study the response of the structure of an asymptotic giant branch (AGB) star to the accretion of a brown dwarf or planet in its interior. In particular, we examine the case in w…
Precession of collimated outflows from young stellar objects
C. Terquem, J. Eisloffel, J. Papaloizou +1
We consider several protostellar systems where either a precessing jet or at least two misaligned jets have been observed. We assume that the precession of jets is caused by tidal…
New neighbours. I. 13 new companions to nearby M dwarfs
X. Delfosse, T. Forveille, J. -L. Beuzit +3
We present preliminary results of a radial-velocity search for companions to a volume limited sample of M dwarfs. Typical accuracy range between 10m/s for the brighter stars and 70…