Spontaneously Broken Translational Invariance of Compactified Space

Details Spontaneously Broken Translational Invariance of Compactified Space Spontaneously Broken Translational Invariance of Compactified Space

1999-02-10

arxiv.org/abs/hep-th/9902069v1

Phys.Lett. B457 (1999) 33-38

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, No figure

Scientific paper

10.1016/S0370-2693(99)00555-9

We propose a mechanism to break the translational invariance of compactified space spontaneously. As a simple model, we study a real $\phi^4$ model compactified on $M^{D-1}\otimes S^1$ in detail, where we impose a nontrivial boundary condition on $\phi$ for the $S^1$-direction. It is shown that the translational invariance for the $S^1$-direction is spontaneously broken when the radius $R$ of $S^1$ becomes larger than a critical radius $R^*$ and also that the model behaves like a $\phi^4$ model on a single kink background for $R \to \infty$. It is pointed out that spontaneous breakdown of translational invariance is accompanied by that of some global symmetries, in general, in our mechanism.

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