Application of the light-front coupled-cluster method to φ4 theory in two dimensions

Blair Elliott, Sophia S Chabysheva, John R Hiller

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12 Scopus citations

Abstract

As a first numerical application of the light-front coupled-cluster (LFCC) method, we consider the odd-parity massive eigenstate of φ1+14 theory. The eigenstate is built as a Fock-state expansion in light-front quantization, where wave functions appear as coefficients of the Fock states. A standard Fock-space truncation would then yield a finite set of linear equations for a finite number of wave functions. The LFCC method replaces Fock-space truncation with a more sophisticated truncation, one which reduces the eigenvalue problem to a finite set of nonlinear equations without any restriction on Fock space. We compare our results with those obtained with a Fock-space truncation that yields the same number of equations.

Original languageEnglish (US)
Article number056003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Issue number5
DOIs
StatePublished - Sep 11 2014

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