Abstract
We investigate the width of the flux tube between heavy static quark charges. Using the gauge/gravity duality, we find the properties of the minimal connected surface related to the width of the bound state. We show that in the confining phase, the logarithmic broadening predicted by the effective string description and observed in lattice simulations is a generic property of all confining backgrounds. We also study the transverse fluctuations of the string connecting two static quarks in curved backgrounds. Our formalism is applied to AdS space where we compute the expectation value of the square of transverse deviations of the string, a quantity related to the width.
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Giataganas, D., Irges, N. On the holographic width of flux tubes. J. High Energ. Phys. 2015, 105 (2015). https://doi.org/10.1007/JHEP05(2015)105
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DOI: https://doi.org/10.1007/JHEP05(2015)105