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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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KF
Katharine Fernandez
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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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Nuclear magnetization distribution and hyperfine splitting in Bi$^{82+}$ ion
Fernando Simionato Perrotta
et al.
Dec 30, 2001
Hyperfine splitting in Bi$^{82+}$ and Pb$^{81+}$ ions was calculated usingcontinuum RPA approach with effective residual forces. To fix the parameters ofthe theory the nuclear magnetic dipole moments of two one- particle and twoone-hole nuclei around $^{208}$Pb were calculated using the same approach. Thecontribution from velocity dependent two-body spin- orbit residual interactionwas calculated explicitly. Additionally, the octupole moment of $^{209}$Bi andthe hfs in muonic bismuth atom were calculated as well in the same approach.All the calculated observables, except the electronic hfs in $^{209}$Bi, are ingood agreement with the data. We argue for more accurate measurement of theoctupole moment and the muonic hfs for $^{209}$Bi.
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