90 citations · 967 across the 118 of their papers we have counts for
6 papers · 2 filters
On the ground state of a free massless (pseudo)scalar field in two dimensions
M. Faber, A. N. Ivanov
We investigate the ground state of a free massless (pseudo)scalar field in 1+1-dimensional space-time. We argue that in the quantum field theory of a free massless (pseudo)scalar f…
Bosonic vacuum wave functions from the BCS-type wave function of the ground state of the massless Thirring model
M. Faber, A. N. Ivanov
A BCS-type wave function describes the ground state of the massless Thirring model in the chirally broken phase. The massless Thirring model with fermion fields quantized in the ch…
Massless Thirring fermion fields in the boson field representation
M. Faber, A. N. Ivanov
We show that the boson field representation of the massless fermion fields, suggested by Morchio, Pierotti and Strocchi in J. Math. Phys. 33, 777 (1992) for the operator solution o…
Quantum field theory of a free massless (pseudo)scalar field in 1+1-dimensional space-time as a test for the massless Thirring model
M. Faber, A. N. Ivanov
We analyse different approaches to the description of the quantum field theory of a free massless (pseudo)scalar field defined in 1+1-dimensional space-time which describes the bos…
Is the energy density of the ground state of the sine-Gordon model unbounded from below for beta^2 > 8 pi ?
M. Faber, A. N. Ivanov
We discuss Coleman's theorem concerning the energy density of the ground state of the sine-Gordon model proved in Phys. Rev. D 11, 2088 (1975). According to this theorem the energy…
On spontaneous breaking of continuous symmetry in 1+1-dimensional space-time
M. Faber, A. N. Ivanov
We analyse Coleman's theorem asserting the absence Goldstone bosons and spontaneously broken continuous symmetry in the quantum field theory of a free massless (pseudo)scalar field…