Fermionic Quasiparticle Representation of Tomonaga-Luttinger Hamiltonian

Abstract

We find a unitary operator which asymptotically diagonalizes the Tomonaga-Luttinger hamiltonian of one-dimensional spinless electrons. The operator performs a Bogoliubov rotation in the space of electron-hole pairs. If bare interaction of the physical electrons is sufficiently small this transformation maps the original Tomonaga-Luttinger system on a system of free fermionic quasiparticles. Our representation is useful when the electron dispersion deviates from linear form. For such situation we obtain non-perturbative results for the electron gas free energy and the density-density propagator.

arXiv commentIn the new version two new appendices are added, several errors and misprints are corrected; 19 pages, 3 eps figures

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• Bosonization for Beginners --- Refermionization for Experts
• Electrons, pseudoparticles, and quasiparticles in the one-dimensional many-electron problem

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