Metastable states, the adiabatic theorem and parity violating geometric phases I
Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
Published online: 5 September 2007
A system of metastable plus unstable states is discussed. The mass matrix governing the time development of the system is supposed to vary slowly with time. The adiabatic limit for this case is studied and it is shown that only the metastable states obtain the analogs of the dynamical and geometrical phase factors familiar from stable states. Abelian and non-Abelian geometric phase factors for metastable states are defined.
PACS: 03.65.Vf – Phases: geometric; dynamic or topological / 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries / 31.70.Hq – Time-dependent phenomena: excitation and relaxation processes, and reaction rates / 32.80.Ys – Weak-interaction effects in atoms
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007