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Universality in Effective Strings
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We demonstrate that, due to the finite thickness of domain walls, and the consequent ambiguity in defining their locations, the effective string description obtained by integrating out bulk degrees of freedom contains ambiguities in the coefficients of the various geometric terms. The only term with unambiguous coefficient is the zeroth order Nambu-Goto term. We argue that fermionic ghost fields which implement gauge-fixing act to balance these ambiguities. The renormalized string tension, obtained after integrating out both bulk and world-sheet degrees of freedom, can be defined in a scheme independent manner; and we compute the explicit finite expressions, to one-loop, for the case of compact quantum electrodynamics and phi-4 theory.
Forward citations
Cited by 2 Pith papers
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Constructing A Finite Tension Domain Wall in $\phi^4_4$
The one-loop domain wall tension in φ^4_4 is finite because the positive divergence from the displacement operator is exactly cancelled by the negative divergence from the squeeze (Bogoliubov) contribution.
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(Anti-)Stokes Scattering on the Domain Wall String
Meson scattering off a (2+1)-dimensional domain wall string can excite or de-excite the string's shape mode, and this paper gives the leading-order probability densities for both processes, including forward and backw...
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