8,764 research outputs found
Nonlocality without inequality for spin-s system
We analyze Hardy's non-locality argument for two spin-s systems and show that
earlier solution in this regard was restricted due to imposition of some
conditions which have no role in the argument of non-locality. We provide a
compact form of non-locality condition for two spin-s systems and extend it to
n number of spin-s particles. We also apply more general kind of non-locality
argument still without inequality, to higher spin system.Comment: 6 page
Effect of non-magnetic impurities on the magnetic states of anatase TiO
The electronic and magnetic properties of TiO, TiO,
TiON, and TiOF compounds have been studied
by using \emph{ab initio} electronic structure calculations. TiO is found
to evolve from a wide-band-gap semiconductor to a narrow-band-gap semiconductor
to a half-metallic state and finally to a metallic state with oxygen vacancy,
N-doping and F-doping, respectively. Present work clearly shows the robust
magnetic ground state for N- and F-doped TiO. The N-doping gives rise to
magnetic moment of 0.4 at N-site and 0.1 each at
two neighboring O-sites, whereas F-doping creates a magnetic moment of
0.3 at the nearest Ti atom. Here we also discuss the possible
cause of the observed magnetic states in terms of the spatial electronic charge
distribution of Ti, N and F atoms responsible for bond formation.Comment: 11 pages, 4 figures To appear J. Phys.: Condens. Matte
Nonlocality without inequality for almost all two-qubit entangled state based on Cabello's nonlocality argument
Here we deal with a nonlocality argument proposed by Cabello which is more
general than Hardy's nonlocality argument but still maximally entangled states
do not respond. However, for most of the other entangled states maximum
probability of success of this argument is more than that of the Hardy's
argument.Comment: 9 pages, 1 figur
Shear-strain-induced Spatially Varying Super-lattice Structures on Graphite studied by STM
We report on the Scanning Tunneling Microscope (STM) observation of linear
fringes together with spatially varying super-lattice structures on (0001)
graphite (HOPG) surface. The structure, present in a region of a layer bounded
by two straight carbon fibers, varies from a hexagonal lattice of 6nm
periodicity to nearly a square lattice of 13nm periodicity. It then changes
into a one-dimensional (1-D) fringe-like pattern before relaxing into a
pattern-free region. We attribute this surface structure to a shear strain
giving rise to a spatially varying rotation of the affected graphite layer
relative to the bulk substrate. We propose a simple method to understand these
moire patterns by looking at the fixed and rotated lattices in the Fourier
transformed k-space. Using this approach we can reproduce the spatially varying
2-D lattice as well as the 1-D fringes by simulation. The 1-D fringes are found
to result from a particular spatial dependence of the rotation angle.Comment: 14 pages, 6 figure
Local ionospheric electrodynamics associated with neutral wind fields at low latitudes: Kelvin-Helmholtz billows
International audienceThe Gadanki radar observation of plasma irregularities bearing the signature of Kelvin-Helmholtz billows above 100 km altitude raises the question of the electrodynamical mechanism that would allow the structures to drift with the neutral wind. We show that for locally varying neutral wind fields with the right geometry at night, multiple Hall effects in the electron gas lead to a situation where ions, electrons, and neutrals move together along the component of the wind that changes most rapidly in space. The species must not move together along all directions, however. If this were the case the plasma would be stable and a radar would be unable to observe the wind field. We discuss the stability of the plasma itself for Es layers affected by the Kelvin-Helmholtz wind field and show that a variety of factors have to be taken into account beyond the study of the zeroth order mechanism
Reduction of In(III) at d.m.e. in Presence of Glyoxalate Ions & Determination of Composition & Stability Constants of the Complexes
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