Light-front $\phi^4_{1+1}$ theory using a many-boson symmetric-polynomial basis

Understand

We extend earlier work on fully symmetric polynomials for three-boson wave functions to arbitrarily many bosons and apply these to a light-front analysis of the low-mass eigenstates of $\phi^4$ theory in 1+1 dimensions.

• The basis-function approach allows the resolution in each Fock sector to be independently optimized, which can be more efficient than the preset discrete Fock states in DLCQ.
• We obtain an estimate of the critical coupling for symmetry breaking in the positive mass-squared case.