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Healthy Research Rewards
ResearchHub is incentivizing healthy research behavior. At this time, first authors of open access papers are eligible for rewards. Visit the publications tab to view your eligible publications.
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JD
Julio-Alberto Diaz-Ramos
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Galilean quantum gravity with cosmological constant and the extended q-Heisenberg algebra
amin khouani
et al.
Aug 2, 2010
We define a theory of Galilean gravity in 2+1 dimensions with cosmologicalconstant as a Chern-Simons gauge theory of the doubly-extended Newton-Hookegroup, extending our previous study of classical and quantum gravity in 2+1dimensions in the Galilean limit. We exhibit an r-matrix which is compatiblewith our Chern-Simons action (in a sense to be defined) and show that theassociated bi-algebra structure of the Newton-Hooke Lie algebra is that of theclassical double of the extended Heisenberg algebra. We deduce that, in thequantisation of the theory according to the combinatorial quantisationprogramme, much of the quantum theory is determined by the quantum double ofthe extended q-deformed Heisenberg algebra.
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The Effect of Nuclear Rotation on the Collective Transport Coefficients
Sergio Monteiro
et al.
Apr 11, 2001
We have examined the influence of rotation on the potential energy and thetransport coefficients of the collective motion (friction and masscoefficients). For axially symmetric deformation of nucleus Th-224 we havefound that at excitations corresponding to temperatures T > 1 MeV the shellcorrection to the liquid drop energy practically does not depend on the angularrotation. The friction and mass coefficients obtained within the linearresponse theory for the same nucleus at temperatures larger than T=2 MeV arerather stable with respect to rotation provided that the contributions fromspurious states arising due to the violation of rotation symmetry are removed.At smaller excitations both friction and mass parameters corresponding to theelongation mode are growing functions of rotational frequency.
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