The Long Range Gravitational Potential Energy Between Strings

Details The Long Range Gravitational Potential Energy Between Strings The Long Range Gravitational Potential Energy Between Strings

2001-10-09

arxiv.org/abs/hep-th/0110091v2

Phys.Lett. B523 (2001) 331-337

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, 6 figures

Scientific paper

10.1016/S0370-2693(01)01360-0

We calculate the gravitational potential energy between infinitely long parallel strings with tensions \tau_1 and \tau_2. Classically, it vanishes, but at one loop, we find that the long range gravitational potential energy per unit length is U/L = 24G_N^2\tau_1\tau_2/(5 \pi a^2) + ..., where a is the separation between the strings, G_N is Newton's constant, and we set \hbar = c =1. The ellipses represent terms suppressed by more powers of G_N \tau_i. Typically, massless bulk fields give rise at one loop to a long range potential between p-branes in space-times of dimension p+2+1. The contribution to this potential from bulk scalars is computed for arbitrary p (strings correspond to p=1) and in the case of three-branes its possible relevance for cosmological quintessence is commented on.

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