1,041 research outputs found
Domain wall brane in a reduced Born-Infeld- theory
The Born-Infeld theory is reduced from the Born-Infeld determinantal
gravity in Weitzenb\"ock spacetime. We investigate a braneworld scenario in
this theory and obtain an analytic domain wall solution by utilizing the
first-order formalism. The model is stable against the linear tensor
perturbation. It is shown that the massless graviton is localized on the brane,
but the continuous massive gravitons are non-localized and will generate a tiny
correction with the behavior of to the Newtonian potential.
The four-dimensional teleparallel gravity is recovered as an effective infrared
theory on the brane. As a physical application, we consider the
(quasi-)localization property of spin-1/2 Dirac fermion in this model.Comment: 9 pages, 2 figures, published versio
5-({[(E)-Benzylideneamino]oxy}methyl)-1,3,4-thiadiazol-2-amine
In the molecule of the title compound, C10H10N4OS, the configuration about the C=N double bond is E. The dihedral angle between the thiadiazole and benzene rings is 81.1 (1)°. In the crystal, molecules are linked by N—H⋯N and C—H⋯O hydrogen bonds to form a two-dimensional network parallel with the bc plane
6-(4-Fluorophenethyl)-7-imino-3-phenyl-2,3,6,7-tetrahydro-1,3-thiazolo[4,5-d]pyrimidine-2-thione
In the title compound, C19H15FN4S2, the mean plane of the thiazolopyrimidine makes a dihedral angle of 77.6 (1)° with the attached phenyl ring. The crystal packing is stabilized by intermolecular C—H⋯N hydrogen bonds and weak C—H—π stacking interactions
Ground state and edge excitations of quantum Hall liquid at filling factor 2/3
We present a numerical study of fractional quantum Hall liquid at Landau
level filling factor in a microscopic model including long-range
Coulomb interaction and edge confining potential, based on the disc geometry.
We find the ground state is accurately described by the particle-hole conjugate
of a Laughlin state. We also find there are two counter-propagating
edge modes, and the velocity of the forward-propagating mode is larger than the
backward-propagating mode. The velocities have opposite responses to the change
of the background confinement potential. On the other hand changing the
two-body Coulomb potential has qualitatively the same effect on the velocities;
for example we find increasing layer thickness (which softens of the Coulomb
interaction) reduces both the forward mode and the backward mode velocities.Comment: 12 pages, 13 figure
(E)-(2-Chlorobenzylidene)amino 2-amino-4-chlorobenzoate
In the title compound, C14H10Cl2N2O2, the configuration about the C=N double bond is E and the dihedral angle between the benzene rings is 1.75 (5)°. An intramolecular N—H⋯O interaction generates an S(6) ring. In the crystal, molecules are linked by N—H⋯O hydrogen bonds, resulting in [101] chains
N-[3,5-Dichloro-4-(1,1,2,2-tetrafluoroethoxy)phenyl]-2,6-difluorobenzamide
In the title compound, C15H7Cl2F6NO2, the conformation of the N—H bond in the amide segment is anti to the C=O bond and the dihedral angle between the two benzene rings is 78.6 (3)°. The terminal –CHF2 group is disordered over two orientations in a 0.67:0.33 ratio. In the crystal, the molecules are linked by N—H⋯O hydrogen bonds, generating C(4) chains propagating in [100]
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