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.
Q-ball superradiance: Analytical approach
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Linearized Q-Ball Perturbations
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.