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252 papers · 1 filter
Cerenkov radiation from moving straight strings
D. V. Gal'tsov, E. Yu. Melkumova, K. Salehi
We study Cerenkov radiation from moving straight strings which glisse with respect to each other in such a way that the projected intersection point moves faster than light. To cal…
Radiation reaction in curved space-time: local method
Dmitri Gal'tsov, Pavel Spirin, Simona Staub
Although consensus seems to exist about the validity of equations accounting for radiation reaction in curved space-time, their previous derivations were criticized recently as not…
Asymptotics of Eigenvalues and Eigenfunctions for the Laplace Operator in a Domain with Oscillating Boundary. Multiple Eigenvalue Case
Youcef Amirat, Gregory A. Chechkin, Rustem R. Gadyl'shin
We study the asymptotic behavior of the solutions of a spectral problem for the Laplacian in a domain with rapidly oscillating boundary. We consider the case where the eigenvalue o…
Cylindrically symmetric solitons in Einstein-Yang-Mills theory
Dmitri V. Gal'tsov, Evgeny A. Davydov
Recently new Einstein-Yang-Mills (EYM) soliton solutions were presented which describe superconducting strings with Kasner asymptotic (hep-th/0610183). Here we study the static cyl…
Dilaton and axion bremsstrahlung from collisions of cosmic (super)strings
E. Yu. Melkumova, D. V. Gal'tsov, K. Salehi
We calculate dilaton and axion radiation generated in the collision of two straight initially unexcited strings and give a rough cosmological estimate of dilaton and axion densitie…
Comparative study of phase transitions in polycrystalline and epitaxial BaTiO3 thin films by means of specific heat measurements
B. Strukov, S. Davitadze, V. Lemanov +3
The experimental data on the thermal properties of the nanostructured perovskite ferroelectrics are presented and analysed. The ability of the modified 3w method for specific heat…