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16 papers · 1 filter
Killing spinor equations in dimension 7 and geometry of integrable G_2-manifolds
Thomas Friedrich, Stefan Ivanov
We compute the scalar curvature of 7-dimensional -manifolds admitting a connection with totally skew-symmetric torsion. We prove the formula for the general solution of the…
Generation of lattice structures of optical vortices
Alexander Dreischuh, Sotir Chervenkov, Dragomir Neshev +2
We demonstrate experimentally the generation of square and hexagonal lattices of optical vortices and reveal their propagation in a saturable nonlinear medium. If the topological c…
Observation of a sharp lambda peak in the third harmonic voltage response of high-Tc superconductor thin films
Nicolas Cheenne, Todor Mishonov, Joseph Indekeu
In this paper, we report on the sharp peak observed in the third harmonic voltage response generated by a bias sinusoidal current applied to several strips patterned in a YBa2Cu3O7…
Superconducting Diamagnetic Fluctuations in MgB2
A. Lascialfari, T. Mishonov, A. Rigamonti +2
The fluctuating diamagnetic magnetization Mfl at constant field H as a function of temperature and the isothermal magnetization Mfl vs H are measured in MgB2, above the superconduc…
The First Known Mira-type Variable Star in IC 1613
R. Kurtev, L. Georgiev, J. Borissova +3
King, Modjaz, & Li (1999) discovered Nova 1999 in IC1613 at Lick Observatory. Both Fugazza et al. (2000) and Borissova et al. (2000) questioned this classification, because they we…
Solution generating in scalar-tensor theories with a massless scalar field and stiff perfect fluid as a source
Stoytcho S. Yazadjiev
We present a method for generating solutions in some scalar-tensor theories with a minimally coupled massless scalar field or irrotational stiff perfect fluid as a source. The meth…