Comment on relativistic ideal soliton-gas approximations |
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| Authors: | SE Trullinger AR Bishop |
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| Institution: | Department of Physics, University of Southern California, Los Angeles, CA 90007, U.S.A.;Statistical Physics and Materials Theory Group, Los Alamos Scientific Laboratory, Los Alamos, NM 87545, U.S.A. |
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| Abstract: | We comment on the validity of using relativistic, ideal, Boltzmann-kink-gas phenomenology involving “bare” kinks for interpretation of experiments and molecular dynamics simulations. An improved velocity distribution is obtained for sine-Gordon and ?-four kink gases which incorporates the kink renormalization found to be essential in obtaining the correct total kink density. We argue, however, that even with this improvement, current ideal gas phenomenologies can only be trusted at low temperatures compared to the kink rest energy, where the majority of kinks have low velocity in any case. |
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