C0-Groups, Commutator Methods and Spectral Theory of N-Body Hamiltonians

1. Front Matter

   Pages i-xiv

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2. Some Spaces of Functions and Distributions

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 1-28

3. Real Interpolation of Banach Spaces

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 29-72

4. C 0-Groups and Functional Calculi

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 73-170

5. Some Examples of C 0-Groups

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 171-190

6. Groups of Automorphisms Associated to C 0-Representations of ℝ n

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 191-233

7. Unitary Representations and Regularity for Self-adjoint Operators

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 235-265

8. The Conjugate Operator Method

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 267-356

9. An Algebraic Framework for the Many-Body Problem

   • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

   Pages 357-399

10. Spectral Theory of N-Body Hamiltonians

    • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

    Pages 401-432

11. Quantum-Mechanical N-Body Systems

    • Werner O. Amrein, Anne Boutet de Monvel, Vladimir Georgescu

    Pages 433-443

12. Back Matter

    Pages 445-464

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The relevance of commutator methods in spectral and scattering theory has been known for a long time, and numerous interesting results have been ob­ tained by such methods. The reader may find a description and references in the books by Putnam [Pu], Reed-Simon [RS] and Baumgartel-Wollenberg [BW] for example. A new point of view emerged around 1979 with the work of E. Mourre in which the method of locally conjugate operators was introduced. His idea proved to be remarkably fruitful in establishing detailed spectral properties of N-body Hamiltonians. A problem that was considered extremely difficult be­ fore that time, the proof of the absence of a singularly continuous spectrum for such operators, was then solved in a rather straightforward manner (by E. Mourre himself for N = 3 and by P. Perry, 1. Sigal and B. Simon for general N). The Mourre estimate, which is the main input of the method, also has consequences concerning the behaviour of N-body systems at large times. A deeper study of such propagation properties allowed 1. Sigal and A. Soffer in 1985 to prove existence and completeness of wave operators for N-body systems with short range interactions without implicit conditions on the potentials (for N = 3, similar results were obtained before by means of purely time-dependent methods by V. Enss and by K. Sinha, M. Krishna and P. Muthuramalingam). Our interest in commutator methods was raised by the major achievements mentioned above.

• PDE
• algebra
• calculus
• functional analysis
• quantum mechanics

• Ecole de Physique, Université de Genève, Genève 4, Switzerland

  Werner O. Amrein

• Institut de Mathématiques de Paris-Jussieu, C.N.R.S. UMR 9994, Université Paris VII Denis Diderot, Paris Cedex 05, France

  Anne Boutet Monvel, Vladimir Georgescu