63,674 research outputs found
Space charge limited release of charged inverse micelles in non-polar liquids
Charged inverse micelles (CIMs) generated during a continuous polarizing voltage between
electrodes in the model system of polyisobutylene succinimide in dodecane do not populate a
diffuse double layer like CIMs present in equilibrium (regular CIMs), but instead end up in
interface layers. When the applied voltage is reversed abruptly after a continuous polarizing
voltage step, two peaks are observed in the transient current. The first peak is due to the
release of regular CIMs from the diffuse double layers formed during the polarizing voltage
step, which is understood on the basis of the Poisson-Nernst-Planck equations. The second
peak is due to the release of a small fraction of generated negative CIMs from the interface
layer. A model based on space charge limited release of the generated negative CIMs from the
interface layer is presented and the results of the model are compared with several types of
measurements. For the situation in which the bulk is deprived of regular CIMs and neutral
inverse micelles, the results of the model are in agreement with the experimental results.
However, for the situation in which regular CIMs and neutral inverse micelles are present, the
model shows discrepancies with the experiment for high voltages and high charge contents.
These discrepancies are attributed to electrohydrodynamic flow caused by local variations in
the electric field at the vicinity of the electrodes, which occur during the reversal voltage.
Also the long term decrease of the amount of released generated CIMs is studied and it is
found that the presence of regular CIMs and neutral inverse micelles speeds up the decrease.
This study provides a deeper insight in the electrodynamics of CIMs and is relevant for
various applications in non-polar liquids
Event activity-dependence of jet production in p-Pb collisions at TeV measured with semi-inclusive hadron+jet correlations by ALICE
We report measurement of the semi-inclusive distribution of charged-particle
jets recoiling from a high transverse momentum () hadron trigger,
for p-Pb collisions at TeV, in p-Pb events
classified by event activity. This observable has been measured in pp and Pb-Pb
collisions at the LHC, providing a new probe to measure quenching. Jets are
reconstructed from charged particle tracks using anti- with and low IR cutoff of jet constituents ( GeV/).
The complex uncorrelated jet background is corrected by a data-driven approach.
Recoil jet distributions are reported for
GeV/. Events are classified by signal in the ALICE V0A detector, which
measures forward multiplicity, and ZNA, which measures the number of neutrons
at zero degrees. This self-normalized observable does not require scaling of
reference distributions by , thereby avoiding the need for
geometric modeling. We compare the trigger-normalized recoil jet yield for p-Pb
collisions with different event activity to measure the effects of jet
quenching in small systems at the LHC.Comment: Proceedings of the Quark Matter 2017 conference, February 6-11, 201
Affine connections and second-order affine structures
Smooth manifolds have been always understood intuitively as spaces with an
affine geometry on the infinitesimal scale. In Synthetic Differential Geometry
this can be made precise by showing that a smooth manifold carries a natural
structure of an infinitesimally affine space. This structure is comprised of
two pieces of data: a sequence of symmetric and reflexive relations defining
the tuples of mutual infinitesimally close points, called an infinitesimal
structure, and an action of affine combinations on these tuples. For smooth
manifolds the only natural infinitesimal structure that has been considered so
far is the one generated by the first neighbourhood of the diagonal. In this
paper we construct natural infinitesimal structures for higher-order
neighbourhoods of the diagonal and show that on any manifold any symmetric
affine connection extends to a second-order infinitesimally affine structure
Quantum partial teleportation as optimal cloning at a distance
We propose a feasible scheme of conditional quantum partial teleportation of
a qubit as optimal asymmetric cloning at a distance. In this scheme, Alice
preserves one imperfect clone whereas other clone is teleported to Bob.
Fidelities of the clones can be simply controlled by an asymmetry in Bell-state
measurement. The optimality means that tightest inequality for the fidelities
in the asymmetric cloning is saturated. Further we design a conditional
teleportation as symmetric optimal N-> N+1 cloning from N Alice's replicas on
single distant clone. We shortly discussed two feasible experimental
implementations, first one for teleportation of polarization state of a photon
and second one, for teleportation of a time-bin qubit.Comment: 5 pages, 3 figure
Torsion of elliptic curves over quadratic cyclotomic fields
In this paper we study the possible torsions of elliptic curves over and .Comment: 9 pages, to appear in Math. J. Okayama Univ
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