Abstract
An infinitely long chromoelectric flux tube breaks translation invariance in transverse directions spontaneously. We argue that the associated Goldstone bosons live effectively in 1 + 1 dimensions and therefore, by the Mermin-Wagner-Coleman theorem, destabilize the flux tube. A large class of effective lagrangians describing the long-wavelength fluctuations of (finite) flux tubes is furthermore shown to give rise to a quark potential V( L) = αL + β + γL −1 + O( L −2), where γ is a universal constant.
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