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| Content Provider | Springer Nature Link |
|---|---|
| Author | Møller, Jacob Schach Rasmussen, Morten Grud |
| Copyright Year | 2012 |
| Abstract | In this paper we continue the study of the energy-momentum spectrum of a class of translation invariant, linearly coupled, and massive Hamiltonians from non-relativistic quantum field theory. The class contains the Hamiltonians of E. Nelson (J Math Phys 5:1190–1197, 1964) and H. Fröhlich (Adv Phys 3:325–362, 1954). In Møller (Ann Henri Poincaré 6:1091–1135, 2005; Rev Math Phys 18:485–517, 2006) one of us previously investigated the structure of the ground state mass shell and the bottom of the continuous energy-momentum spectrum. Here we study the continuous energy-momentum spectrum itself up to the two-boson threshold, the threshold for energetic support of two-boson scattering states. We prove that non-threshold embedded mass shells have finite multiplicity and can accumulate only at thresholds. We furthermore establish the non-existence of singular continuous energy-momentum spectrum. Our results hold true for all values of the particle-field coupling strength but only below the two-boson threshold. The proof revolves around the construction of a certain relative velocity vector field used to construct a conjugate operator in the sense of Mourre. |
| Starting Page | 793 |
| Ending Page | 852 |
| Page Count | 60 |
| File Format | |
| ISSN | 14240637 |
| Journal | Annales Henri Poincaré |
| Volume Number | 14 |
| Issue Number | 4 |
| e-ISSN | 14240661 |
| Language | English |
| Publisher | SP Birkhäuser Verlag Basel |
| Publisher Date | 2012-10-20 |
| Publisher Place | Basel |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Theoretical, Mathematical and Computational Physics Dynamical Systems and Ergodic Theory Quantum Physics Mathematical Methods in Physics Classical and Quantum Gravitation, Relativity Theory Elementary Particles, Quantum Field Theory |
| Content Type | Text |
| Resource Type | Article |
| Subject | Statistical and Nonlinear Physics Nuclear and High Energy Physics Mathematical Physics |
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