منابع مشابه
Wiggly relativistic strings.
We derive the equations of motion for general strings, i.e. strings with arbitrary relation between tension τ and energy per unit length ǫ. The renormalization of τ and ǫ that results from averaging out small scale wiggles on the string is obtained in the general case to lowest order in the amount of wiggliness. For Nambu-Goto strings we find deviations from the equation of state ǫτ = constant ...
متن کاملStretching wiggly strings.
How does the amplitude of a wiggle on a string change when the string is stretched? We answer this question for both longitudinal and transverse wiggles and for arbitrary equation of state, i.e., for arbitrary relation between the tension τ and the energy per unit length ǫ of the string. This completes our derivation of the renormalization of string parameters which results from averaging out s...
متن کاملExact metric around a wiggly cosmic string
The exact metric around a wiggly cosmic string is found by modifying the energy momentum-tensor of a straight infinitely thin cosmic string to include an electric current along the symmetry axis.
متن کاملWiggly Strings in Linearized Brans-dicke Gravity
The metric around a wiggly cosmic string is calculated in the linear approximation of Brans-Dicke theory of gravitation. The equations of motion for relativistic and nonrelativistic particles in this metric are obtained. Light propagation is also studied and it is shown that photon trajectories can be bounded. PACS numbers: 98.80.Cq 04.50.+h 11.27.+d Electronic mail: [email protected] El...
متن کاملGradient Systems with Wiggly Energies and Related Averaging Problems
Gradient systems with wiggly energies of the form ẋ = −∇ (
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ژورنال
عنوان ژورنال: Nature
سال: 1997
ISSN: 0028-0836,1476-4687
DOI: 10.1038/39188