Imposing zero total momentum enables perturbative construction of the quantum ground state for solitons despite zero modes from broken translation invariance.
Nonperturbative Methods and Extended Hadron Models in Field Theory 2. Two-Dimensional Models and Extended Hadrons
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At leading order in amplitude, linearized modes of thick-walled Q-balls in 1+1D are solved in closed form, with corotating modes resembling breathers and counterrotating modes becoming Feshbach quasinormal modes via an irrational Pöschl-Teller potential.
New spectral and perturbation methods for one-loop domain wall tension agree with dimensional regularization when the renormalization scheme is the same.
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Scheme Dependence of the One-Loop Domain Wall Tension
New spectral and perturbation methods for one-loop domain wall tension agree with dimensional regularization when the renormalization scheme is the same.