• Lawrence HorwitzEmail author
  • Yosef Strauss
Part of the Mathematical Physics Studies book series (MPST)


In the first part of this book, we have described an approach to the treatment of unstable quantum systems from a fundamentally new point of view, although the methods we have used have their source in the older work of Nagy and Foias (Nagy 1976), for which a system with exact semigroup evolution on a Hilbert space is embedded in a larger space in which the evolution is unitary. Projection back to the smaller space, a subspace of the larger space, then has exact semigroup evolution.

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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.School of Physics, Raymond and Beverly Sackler, Faculty of Exact SciencesTel Aviv UniversityRamat AvivIsrael
  2. 2.Department of PhysicsBar-Ilan UniversityRamat GanIsrael
  3. 3.Department of PhysicsAriel UniversitySamariaIsrael
  4. 4.Department of MathematicsBen-Gurion University of the NegevBeér ShevaIsrael

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