Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Poster I - Interaction with external fields
A 12.3: Poster
Dienstag, 20. März 2007, 16:30–18:30, Poster B
Negative Energy Resonances of Bosons in a Magnetic Quadrupole Trap — •Shahpoor Saeidian1 and Peter Schmelcher1,2 — 1Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany — 2Theoretische Chemie, Institut für Physikalische Chemie, Universität Heidelberg, INF 229, 69120 Heidelberg, Germany
We investigate resonances of spin 1 bosons in a three-dimensional magnetic quadrupole field. Complementary to the well-known positive energy resonances it is shown that there exist short-lived, i.e. broad, negative energy resonances. The latter originate from a fundamental symmetry of the corresponding Hamiltonian. They are characterized by an atomic spin that is aligned antiparallel to the local magnetic field direction. In contrast to the positive energy resonances the lifetimes of the negative energy resonances decreases with increasing total magnetic quantum number. We derive a mapping of the two branches of the spectrum.