Quantum decay into a non-flat continuum

James Aisenberg, Itamar Sela, Tsampikos Kottos, Doron Cohen, Alex Elgart

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We study the decay of a prepared state into non-flat continuum. We find that the survival probability P(t) might exhibit either stretched-exponential or power-law decay, depending on non-universal features of the model. Still there is a universal characteristic time t0 that does not depend on the functional form. It is only for a flat continuum that we get a robust exponential decay that is insensitive to the nature of the intra-continuum couplings. The analysis highlights the co-existence of perturbative and non-perturbative features in the local density of states, and the nonlinear dependence of 1/t0 on the strength of the coupling.

Original languageEnglish
Article number095301
JournalJournal of Physics A: Mathematical and Theoretical
Issue number9
StatePublished - 1 Mar 2010

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Modeling and Simulation
  • Mathematical Physics
  • General Physics and Astronomy


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