Abstract:
We consider a model describing a "truncated" operator (truncated with
respect to the number of particles) acting in the direct sum of zero-,
one-, and two-particle subspaces of a Fock space. Under some natural
conditions on the parameters specifying the model, we prove that the discrete
spectrum is finite.
Keywords:
discrete spectrum, Fock space, compact operator, continuity in the uniform operator topology, Hilbert–Schmidt operator, Weinberg equation.
Citation:
T. H. Rasulov, “Discrete spectrum of a model operator in Fock space”, TMF, 152:3 (2007), 518–527; Theoret. and Math. Phys., 152:3 (2007), 1313–1321
This publication is cited in the following 4 articles:
M. Muminov, H. Neidhardt, T. Rasulov, “On the spectrum of the lattice spin-boson Hamiltonian for any coupling: 1D case”, Journal of Mathematical Physics, 56:5 (2015)
T. H. Rasulov, “Study of the essential spectrum of a matrix operator”, Theoret. and Math. Phys., 164:1 (2010), 883–895
Rasulov T.H., “Investigations of the Essential Spectrum of a Hamiltonian in Fock Space”, Applied Mathematics & Information Sciences, 4:3 (2010), 395–412
T. H. Rasulov, “Investigation of the spectrum of a model operator in a Fock space”, Theoret. and Math. Phys., 161:2 (2009), 1460–1470