Strings with Negative Stiffness and Hyperfine Structure

Abstract

We propose a new string model by adding a higher-order gradient term to the rigid string, so that the stiffness can be positive or negative without loosing stability. In the large-D approximation, the model has three phases, one of which with a new type of generalized "antiferromagnetic" orientational correlations. We find an infrared-stable fixed point describing world-sheets with vanishing tension and Hausdorff dimension D_H=2. Crumpling is prevented by the new term which suppresses configurations with rapidly changing extrinsic curvature.

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References in corpus (2)

• Surfaces with Long-Range Correlations from Non-Critical Strings
• Geometric Aspects of Confining Strings

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